Hurst, Bernadette J. Puleo€¦ · G57, 40.00 mg CMAS SiO Wellman -Aygun Smialek Braue 0 49 mole%;...

National Aeronautics and Space Adm

inistration

Calcium

-Magnesium

-Alum

ino-Silicates (CM

AS) R

eaction M

echanisms and R

esistance of Advanced Turbine Environm

ental B

arrier Coatings for SiC

SiC C

eramic M

atrix Com

posites

Dongm

ing Zhu Gustavo C

osta Bryan J H

arder Valerie L Wiesner Janet B

H

urst Bernadette J P

uleo

Materials and S

tructures Division

NA

SA

John H G

lenn Research C

enter C

leveland Ohio 44135

Advanced Ceram

ic Matrix C

omposites

Science and Technology of Materials D

esign Applications Performance and Integration

An EC

I Conference Santa Fe N

M

Novem

ber 8 2017

ww

wnasagov

1

Temperature

Capability


inistration

NA

SA Environm

ental Barrier Coatings (E

BCs) and C

eramic

Matrix C

omposite (C

MC

) System

Developm

entminus

Emphasize m

aterial temperature capability perform

ance and long-term

durability-Highly loaded E

BC

-CM

Cs w

ith temperature capability of 2700degF

(1482degC)

bull 2700-3000degF (1482-1650degC) turbine and C

MC

combustor coatings

bull 2700degF (1482degC) E

BC

bond coat technology for supporting next generation ndashR

ecession lt5 mgcm

2 per 1000 h ndashC

oating and component strength requirem

ents 15-30 ksi or 100-207 Mpa

ndashResistance to C

alcium M

agnesium A

lumino-S

ilicate (CM

AS

) Step increase in the m

aterialrsquos temperature capability

Temperature

3000degF SiC

SiC

CM

C airfoil

Capability (TE(TEBBC)C) ssuurfarfaccee

and combustor

3000degF+ (1650degC+)

technologies 2700degF S

iCS

iC thin turbine

2700degF (1482qC)

2700degF (1482degC) G

en III SiCSiC

CM

Cs

EB

C system

s for CM

C

airfoils


en I and Gen II SiC

SiC

CM

Cs

2000degF (1093degC) PtAl and N

iAl bond coats

Gen II ndash

Currentcomm

ercialG

en IIIG

en IV

Increase in T across TEBC

Single Crystal Superalloy

Ceramic M

atrix Composite

Gen II ndash Current com

mercial

Gen III

Gen IV



Ceramic M

atrix Composite

2800ordmF com

bustor TB

C

2500ordmF Turbine TB

C

GGenen II

YYearear

ww

wnasagov

2


inistration

Outline

bullN

ASA environm

ental barrier coating (EBC

) development the C

MAS

relevance and importance

minus E

BC

systems

minus C

MA

S com

positions

bullSom

e generalized CM

AS related failures

bullC

MAS degradation of environm


) systems rare

earth silicates ndash

Ytterbium

silicate and yttrium silicate E

BC

s ndash

Som

e reactions kinetics and mechanism

s

bullC

urrent advanced EBC

s HfO

2 -and Rare Earth -Silicon based 2700degF+

capable bond coats ndash

Som

e CM

AS

durability tests and results

bull Sum

mary

ww

wnasagov

3


inistration

EBC-C

MA

S D

egradation is of Concern w

ith Increasing O

perating Temperatures

minusEm

phasize improving tem

perature capability performance and long-term

durability of ceram

ic turbine airfoils bull

Increased gas inlet temperatures for net generation engines lead to significant C

MA

S -

related coating durability issues ndash CM

AS

infiltration and reactions

Marcus P B

orom et al S

urf Coat

Technol 86-87 1996

Current airfoil C

MA

S attack

region -R D

arolia International M

aterials Review

s 2013

ww

wnasagov

4


inistration

Calcium

Magnesium

Alumino-Silicate (C

MAS) System

s Used

in Laboratory Tests minus

N

AS

A m

odified version (NA

SA

CM

AS

) and the Air Force -P

owder Technology Incorporated

PTI 02 C

MA

S currently being used for advanced coating developm

ents minus

C

MA

S S

iO2 content typically ranging from

43-49 mole

such as NASArsquos CMAS (with N

iO

and FeO)

NA

SA m

odified CM

AS

AR

FL PTI CM

AS 02

(higher SiO2 )

GEB

orom

Wellm

an

Kram

er

Aygun Smialek

Rai

Braue

AR

FL PTI 11717A

02

Fully reacted A

s received

AFR

L02 particle size

distribution (34

Quartz 30

Gypsum

17

Aplite 14

Dolom

ite 5

Salt) Percentile Size (μm

) 10 25 +-10 50 85 +-20 90 405 +-30

Fully reacted C

MA

S EDS

ww

wnasagov

5


inistration

Calcium

Magnesium

Alumino-Silicate (C

MAS) System

s Used

in Laboratory Tests -Continued

minus

NA

SA

modified version (N

AS

A C

MA

S)

minus

CM

AS

SiO

2 content typically ranging from 43-49 m

ole such as N

ASArsquos CMAS (with N

iO

and FeO)

NA

SA

CM

AS

Com

positions

NA

SA m

odified CM

AS

AR

FL PTI CM

AS 02

(higher SiO2 )

GEB

orom

Wellm

an

Kram

er

Aygun Smialek

Rai

Braue

Method

Content (m

ol)

CaO

M

gO

Al2 O3

SiO2

Fe2 O

3 N

iO

(DesignedTargeted)

338 90

67 460

30 15

Measured by IC

P-O

ES 38 r 2

90 r 05 69 r 03

41 r 2 38 r 02

137 r 007

Measured by ED

S 36 r 1

84 r 03 75 r 02

43 r 1 39 r 01

15 r 01

Created w

ith NE

TZSC

H P

roteus software

[] Type [11] D

ynamic

Range

2550(Km

in)1500 A

cqRate

7500 S

TC

0 P

1N2O

2 500

Corr

DS

C020

[] Type [13] D

ynamic

Range

150050(Km

in)25 A

cqRate

7500 S

TC

0 P

1N2O

2 500

Corr

DS

C020

Project

Identity D

atetime

Laboratory O

perator S

ample

G57

6282016 91511 AM

G

lenn Research C

enter C

osta G

57 4000 mg

Reference

Material

Corrtem

pcal S

ensfile S

ample carTC

M

odetype of meas R

ef Al2O

30 mg

baseline for YS

Z 5 C_m

in up tp 1500 C 06-24-16bd8 TC

ALZE

RO

TMX

sensitivity from

sapphire_Pt crucible 1500C

air 01-06-16ed8 D

SC

Cp S

S

DS

C sam

ple with correction

Segm

ents C

rucible A

tmosphere

M range

3 DS

CTG

pan Pt

N2O

2 500mlm

in 5000 microV

Instrument N

ETZS

CH

DS

C 404F1 File C

NE

TZSC

HP

roteusdata5CostaS

amplesG

62dd8 Rem

ark Third DS

C run since O

ct 2014 1x evacbackfill

200 400

600 800

1000 1200

1400 Tem

perature degC

-10

-08

-06

-04

-02

00

02

04

DS

C (m

Wm

g)

0 50

100

150

200

250

Flow (m

lmin)

Main

exo

DSC

traces of CM

AS during heating and cooling up

to 1500 qC at 5 qC

min

ww

wnasagov

6


inistration

Advanced N

AS

A E

BC

Developm

ents

Improved tem

perature capability sintering phase stability recession resistance and high tem

perature strength

Advanced com

positions amp processing for com

bined therm

omechanical loading and environm

ents higher stability and increased toughness tow

ards prime-reliant

Gen I (E

PM)

RampD

Award

Gen II (U

EET)

2000-2004 Advanced EBC

(U

EET) 2000-2005 R

ampD Aw

ard (2007)

Advanced EBC (FAP)

2005-2011 R

ampD Aw

ard (2007) coating turbine developm

ent

Advanced EBC

(FAP -ERA)

2007 -present

Advanced (FAP ERA)

Patent13923450 PC

TUS1346946 and subsequent patents

Engine C

omponents

Com

bustor C

ombustor

(Vane) C

ombustor

Vane Vane Blade

-VaneBlade EB

Cs

-Equivalent APS com

bustor EBC

s

Airfoil components

Top Coat

BSAS (APS) R

E2 Si2 O

7 or R

E2 SiO

5 (APS)

-(HfY

bGdY

) 2 O3

-ZrO2 H

fO2 +R

E

silicates -ZrO

2 HfO

2 +BS

AS

(APS and EBPVD

)

RE-H

fO2 -Alum

ino silicate

(APS andor 100

EB-

PVD)

RE-H

fO2 -X

advanced top coat R

E-HfO

2 Silica (EB

-PVD etc vapor

deposition)

Advanced EBC

s

Interlayer --

--R

E-HfO

2 ZrO2 -

aluminosilicate

layered systems

Nanocom

posite graded oxidesilicate

--

EBC

M

ullite+ BSAS R

E2 Si2 O

7 and or BSAS+M

ullite

RE

silicates or R

E-Hf m

ullite R

E doped m

ullite-HfO

2 or R

E silicates

Multi-com

ponent R

E silicate systems

Multicom

ponent R

E-silicate + Hf self

grown

Bond C

oat Si

Si O

xide+Si bond coat

HfO

2 -Si-X

doped mulliteSi

SiC nanotube

Optim

ized HfO

2 -Si-X bond coat 2700degF bond coats

RE-Si+H

f systems

Thickness 10-15 m

il 10-15 m

il 15-20 m

il 10 m

il 5 m

il 1 -3 m

ils

Surface T U

p to 2400degF 2400degF

3000degF2400CM

C

2700degF2400F CM

C

2700-3000degF

Bond Coat T

Limited to

2462degF Lim

it to 2462degF

Limit to 2642degF

Proven at 2600degF + Advancem

ents targeting 2700degF

2700degF

Challenges overcom

e by advancem

ents

ww

wnasagov

7


inistration

CM

AS

Related D

egradations in EBC

s

Cross-section

50 mm

minus C

MAS effects

bull S

ignificantly reduce melting points of the E

BC

s and bond coats bull

More detrim

ental effects with thin airfoil E

BC

s bull

CM

AS

weakens the coating system

s reducing strength and toughness bullM

AS

increase EB

C diffusivities and perm

eability thus less protective as an environmental

barrier bullC

MA

S interactions w

ith heat flux thermal cycling erosion and therm

omechanical fatigue

Reaction layer spallations

Accelerated C

MC

failure when C

MA

S intact w

ith CM

Cs

Such as yttrium silicate

Coating

surface

EB

C and degradations

CM

AS induced m

elting and failure$w

ww

nasagov 8


inistration

CM

AS R

elated Degradations in E

BCs -C

ontinued minus

CM

AS effects on EBC

temperature capability

bull S

ilicate reactions with N

aO2 and A

l2 O3 silicate

Phase diagram

s showing yttrium

di-silicate reactions w

ith SiO

2 NaO

and Al2 O

3

ww

wnasagov

9


inistration

CM

AS R


BCs -C

ontinued minus

CM

AS effects on EBC


bullRare earths generally have lim

ited temperature capability below

1500degC in the R

E2 O

3 -A

l2 O3 -S

iO2 based system

s bull

Sm

aller ionic size RE

s have higher melting points

Solidus temperature in Ln

2 Si2 O7 -A

l6 Si2 O13 -

SiO2 system

as function of ionic radius

Y Murakam

i and H Yam

amoto J C

eram Soc Jpn 101 [10] 1101-1106 (1993)

ww

wnasagov

10


inistration

Rare Earth D

issolutions in CM

AS Melts

ZrO2 -30Y

2 O3 -15Sm

2 O3 -15Yb

2 O3

ZrO2 -30Y

2 O3 -15N

d2 O

3 -15Yb2 O

3 -03Sc2 O

3

ZrO2 -96Y

2 O3 -22G

d2 O

3 -21Yb2 O

3

Ionic potential trend of RE

Radius size trend of RE

minus Large ionic size rare earths show

ed higher concentration dissolutions in the CM

AS

m

elt for ZrO2 -R

E2 O

3 oxide systems

ZrO2 -R

EO15 -H

f more endotherm

ic

Gustavo and Zhu International C

onference on Advanced C

eramics and C

omposites 2016

ww

wnasagov

11

Front CM

AS side


inistration

CM

AS Related D

egradations in EBC

coated CM

Cs ndash

Laboratory Heat Flux Tests

minusC

MAS effects on EB

C-C

MC

temperature capability tested in laser high heat

flux creep-rupture rig bull

Accelerated failure of C

MC

in loading high heat flux conditions

EBC

coated CV

I-MI C

MC

with N

dYb silicate R

ESi bond coat tested Tsurface 2600degF TC

MC

2450degF

Front heated CM

AS

side B

ack cooled side

Creep strain

Time h

Front CM

AS

side

200h

05

ww

wnasagov

12


inistration

EBC

CM

AS

Surface Initial N

ucleation Dissolution R

eactions ndash

Ytterbium

-and yttrium-silicate silicates reactions and dissolutions in C

AM

S

ndash M

ore sluggish dissolution of ytterbium as com

pared to yttrium

Ytterbium

di-silicate surface CM

AS m

elts 50 Y

tterbium di-silicate surface C

MA

S melts 5 h

h 1300degC

1500degC$

Yttrium

mono-silicate surface C

MA

S Y

ttrium silicate surface C

MA

S melts 5 h

melts 50 h 1300degC

1500degC

A

hlborg and Zhu Surface amp C

oatings Technology 237 (2013) 79ndash87 w

ww

nasagov 13


inistration

Rare E

arth Apatite G

rain Grow

th ndash

Grain grow

th of apatite phase at 1500degC at various tim

es

Ytterbium

silicate system

50 hr 150 hr

200 hr

200 hr50 hr

150 hr

Yttrium

silicate system$

ww

wnasagov

14


inistration

Effect of C

MA

S R

eactions on Grain B

oundary Phases

ndash C

MA

S and grain boundary phase has higher A

l2 O3

content (17-22 mole

) bull

Eutectic region w

ith high Al2 O

3 content ~1200degC m

elting point bull

Loss of SiO

2 due to volatility

200 hr 1500degC

NA

SA

modified

CM

AS

Grain

boundary final phase ndash low

SiO

2 and high A

lumina

ww

wnasagov

15


inistration

Rare E

arth Dissolution in C

MA

S M

elts ndash

Non stoichiom

etric characteristics of the CM

AS

ndash rare earth silicate reacted apatite phases ndash up to 200 h testing

ndash D

ifference in partitioning of ytterbium vs yttrium

in apatite bull

Average AE

OR

E2 O

3 ratio ~ 068 for ytterbium silicate ndash C

MA

S system

bull

Average AE

OR

E2 O

3 ratio ~ 022 for yttrium silicate ndash C

MA

S system

C

omposition in apatite (100 hr)

SiO2

Ahlborg and Zhu Surface amp

Coatings Technology 237 (2013) 79ndash87

RE

2 O3

AEO

Yttrium

Silicate EBC

Com

position in apatite (100 hr)

Ytterbium

Silicate EBC

ww

wnasagov

16


inistration

Advanced N

AS

A E

BC

Developm

ents

NA

SA advanced E

BC

systems em

phasizing high stability HfO

2 -and ZrO2 -R

E2 O

3 -

EBC layer 2 region

EB

Cs

Mol

Mol

SiO

2 EB

C system

RE

2 Si2-x O

7-2x such as (YbG

dY) 2 S

i2-x O7-2x

-Controlled dissolution and m

aintaining coating stability

(YbGdY) 2 S

i2-x O7-2x in

CM

AS

1300degC

(a)

(b)

ww

wnasagov

17


inistration E

xample of N

AS

A A

dvanced Environm

ental Barrier C

oating on S

iCSiC

CM

C System

s

Advanced EB

C coated vanes

HfO

2 -(YbG

dY)2 O

3

(YbG

dY)2 Si2-x O

7-2x

RESi(O

)+Hf B

ond Coat

Gd Y

b Y

O

Si

Yb

Gd Y

Si

Hf

A

lternating layered HfO

2 -Multicom

ponent Rare E

arth silicate EB

Cs used for fundam

ental stability studies

2700degF capable YbG

d-YbO+H

f based bond coats C

oated onto SiC

SiC

CM

C substrates using E

B-P

VD

The bond coat region

ww

wnasagov

18


inistration

CM

AS

Resistant Tests

ndash JE

Ts test of more advanced coating system

s at 2700F

Plasma sprayed (G

dY)2 Si2 O

7 2450 cycles

Special processed Yb

2 Si2 O7 spalling at 450 C

ycles EB

-PVD

(YbG

dY)2 Si2 O

7 total 4450 JETS cycles 100h

2450 4450

450

Hybrid H

f-rare earth aluminate silicate com

pleted 4450 cycles 100h

Hybrid H

ybrid Zr-rare earth silicate completed 4450

cycles 100h

2450 4450

2450 with

CM

AS 2450

ww

wnasagov

19


inistration

High S

tability and CM

AS

Resistance are E

nsured by Advanced H

igh M

elting Point C

oating and Multi-C

omponent C

ompositions A

rea A

Area B

ndash G

enerally improved C

MA

S

resistance of NAS

A R

ESi

System

at 1500degC 100 hr

ndash S

ilica-rich phase precipitation ndash

Rare earth elem

ent leaching into the m

elts (low concentration

~9mol

)

Surface side of the C

MA

S melts

EDS E

ww

wnasagov

20


inistration

Advanced E

BC

-CM

C S

ystem D

emonstrated 300 hr H

igh Cycle and

Low Fatigue D

urability in High H

eat Flux 2700degF Test Conditions

Specimen after 300 h testing

-A turbine airfoil E

BC

with H

fO2 -rare earth silicate and G

dYbSi bond coat on C

VI-M

I CM

C

substrate system selected for heat flux durability testing

-Laser high heat flux rig H

igh Cycle and Low

Cycle Fatigue test perform

ed at Stress

amplitude 10 ksi fatigue frequency 3 H

z at EB

C and 1 hr therm

al gradient cycles -

Tested EB

C surface tem

perature 1537degC (2800degF) and T bond coat tem

perature 1482degC

(2700degF) with C

MA

S

-D

emonstrated 300 hour durability at 2700degF+

-D

etermined fatigue-creep and therm

al conductivity behavior of the EB

C-C

MC

system

Specimen in rig testing

Test Condition Sum

mary

-EB

CC

VI-M

I Fatigue$loading 10 ksi (69 M

Pa) R

=005 with 1 hr Therm

al LC

F$-

TEB

C-surface 1537degC

(2800degF)$-

Tbond coat 1482degC

(2700degF)$-

Tback C

MC

surface 1250degC

(2282degF)

ww

wnasagov

21


inistration

Advanced E

BC

-CM

C Fatigue Test w

ith CM

AS

and in Steam

Jet Tested 300 h D

urability in High H

eat Flux Fatigue Test Conditions

-A

dvanced Hf-N

dYb silicate-N

dYbS

i bond coat EB

C coatings on 3D

architecture C

VI-P

IP S

iC-S

iC C

MC

(EB

-PV

D processing)

-Further understanding w

ater vapor -environmental interactions necessary

Surface view C

MA

S 35m

gcm2)

Back view

CM

AS

35mgcm

2)

ww

wnasagov


inistration

EBC

System

Designs ndash E

ffects of Com

posites and Clustered

Com

positions -

An alternating H

fO2 -and R

E-silicate coatings (EB

-PV

D processing) ndash H

fO2 -layer

infiltration and rare earth silicate layer melting

EB

-PV

D P

rocessed EB

Cs alternating H

fO2 -rich and ytterbium

silicate layer systems for

CM

AS

and impact resistance

ww

wnasagov


inistration

Sum

mary

bullC

MA

S degradation rem

ains a challenge for emerging turbine engine

environmental barrier coating ndash S

iCSiC

CM

C com

ponent systems

bullC

MA

S leads to low

er melting point of E

BC and bond coat system

s with

accelerated EBC

and CM

C degradations

bullN

AS

A advanced E

BC com

positions showed som

e promise for C

MA

S

resistance at temperatures up to 1500degC

in high velocity high heat flux and m

echanical loading tests bull

Currently focus on better understanding of E

BC com

positions and EBC

-CM

AS

interactions particularly with hafnium

zirconium and rare

earth silicates for improved tem

perature capability and CM

AS

resistance bull

Also standardize C

MA

S testing and quantify C

MA

S induced life debits

helping validate life modeling

bullC

ontrolling the compositions for C

MA

S resistance w

hile maintaining

high toughness continued to be a key emphasis

ww

wnasagov

24


inistration

Acknow

ledgements

bullThe w

ork was supported by N

ASA Fundam

ental Aeronautics Program (FAP)

Transformational Tools and Technologies (TTT) Project

bullThe authors are grateful to D

r Michael H

elminiak in the assistant of JETS tests

ww

wnasagov

25


inistration

CM

AS

Reaction K

inetics in Bond C

oats ndash S

iO2 rich phase partitioning in the C

MA

S m

elts ndash R

are earth content leaching low even at 1500degC

ndash M

ore advanced compositions are being im

plemented for im

proved thermom

echanical ndash

CM

AS Partitioning on R

E-Si bond coat 1500degC

100hr

RE incorporations

CM

AS

resistance

ww

wnasagov

26


inistration Strength R

esults of Selected EBC and EBC

Bond Coats

-CM

AS

Reaction R

esulted in Strength Reduction in Silicates

Selected E

BC

systems

ndashH

fO2 -R

E-S

i along with co-doped rare earth silicates and rare earth alum

ino-silicates for optim

ized strength stability and temperature capability

ndashC

MA

S infiltrations can reduce the strength

350 646-Specially alloy toughened t like H

fO2

648-EBC Bond Coat Constituent 300

659-AE9762

150

EBC

s

EBC

s

HfO

2 -Si (Si-rich)

Yb

2 Si 2 O 7

250658-EBC H

fO2-Rare Earth-A

lumino Silicate

660-Y2Si2O

7657-Zr-RE silicate 669-Y

b2Si2O7

Strength MPa

200696-EBC Bond Coat Constituent

100681-H

fO2-Si

669-9762 with CM

AS 1350C 50hr reacted

693-HfO

2-Si with CM


5000

200 400

600 800

1000 1200

1400 1600

Temperature degC

Strength test data compared

Yb

2 Si2 O7 C

MA

S reacted tensile Y

b2 Si2 O

7 CM

AS reacted

specimen fracture surface

surface w

ww

nasagov 27


inistration

High Stability and C

MAS R

esistance Observed from

the Rare

Earth S

ilicon High M

elting Point C

oating Com

positions

ndashD

emonstrated C

MA

S resistance

of NAS

A R

E-Si S

ystem at

1500degC 100 hr

ndash S


Rare earth elem


elts (low concentration ~9

Surface side of the m

ol)

CM

AS m

elts

Area A

Area B

ww

wnasagov

28

Temperature

Capability


inistration

NA

SA Environm

ental Barrier Coatings (E

BCs) and C

eramic

Matrix C

omposite (C

MC

) System

Developm

entminus

Emphasize m

aterial temperature capability perform

ance and long-term

durability-Highly loaded E

BC

-CM

Cs w

ith temperature capability of 2700degF

(1482degC)

bull 2700-3000degF (1482-1650degC) turbine and C

MC

combustor coatings

bull 2700degF (1482degC) E

BC

bond coat technology for supporting next generation ndashR

ecession lt5 mgcm

2 per 1000 h ndashC

oating and component strength requirem

ents 15-30 ksi or 100-207 Mpa

ndashResistance to C

alcium M

agnesium A

lumino-S

ilicate (CM

AS

) Step increase in the m

aterialrsquos temperature capability

Temperature

3000degF SiC

SiC

CM

C airfoil

Capability (TE(TEBBC)C) ssuurfarfaccee

and combustor

3000degF+ (1650degC+)

technologies 2700degF S

iCS

iC thin turbine

2700degF (1482qC)


en III SiCSiC

CM

Cs

EB

C system

s for CM

C

airfoils


en I and Gen II SiC

SiC

CM

Cs

2000degF (1093degC) PtAl and N

iAl bond coats

Gen II ndash

Currentcomm

ercialG

en IIIG

en IV



Ceramic M

atrix Composite

Gen II ndash Current com

mercial

Gen III

Gen IV



Ceramic M

atrix Composite

2800ordmF com

bustor TB

C

2500ordmF Turbine TB

C

GGenen II

YYearear

ww

wnasagov

2


inistration

Outline

bullN

ASA environm


) development the C

MAS


minus E

BC

systems

minus C

MA

S com

positions

bullSom

e generalized CM

AS related failures

bullC



) systems rare


Ytterbium


BC

s ndash

Som


s

bullC

urrent advanced EBC

s HfO



Som

e CM

AS


bull Sum

mary

ww

wnasagov

3


inistration

EBC-C

MA

S D


ith Increasing O


minusEm



durability of ceram



MA

S -


AS


Marcus P B

orom et al S

urf Coat

Technol 86-87 1996

Current airfoil C

MA

S attack

region -R D


aterials Review

s 2013

ww

wnasagov

4


inistration

Calcium

Magnesium

Alumino-Silicate (C

MAS) System

s Used


N

AS

A m

odified version (NA

SA

CM

AS



PTI 02 C

MA


ents minus

C

MA

S S


43-49 mole


iO

and FeO)

NA

SA m

odified CM

AS

AR

FL PTI CM

AS 02

(higher SiO2 )

GEB

orom

Wellm

an

Kram

er

Aygun Smialek

Rai

Braue

AR

FL PTI 11717A

02

Fully reacted A

s received

AFR

L02 particle size

distribution (34

Quartz 30

Gypsum

17

Aplite 14

Dolom

ite 5


) 10 25 +-10 50 85 +-20 90 405 +-30

Fully reacted C

MA

S EDS

ww

wnasagov

5


inistration

Calcium

Magnesium

Alumino-Silicate (C

MAS) System

s Used


minus

NA

SA

modified version (N

AS

A C

MA

S)

minus

CM

AS

SiO


ole such as N


iO

and FeO)

NA

SA

CM

AS

Com

positions

NA

SA m

odified CM

AS

AR

FL PTI CM

AS 02

(higher SiO2 )

GEB

orom

Wellm

an

Kram

er

Aygun Smialek

Rai

Braue

Method

Content (m

ol)

CaO

M

gO

Al2 O3

SiO2

Fe2 O

3 N

iO

(DesignedTargeted)

338 90

67 460

30 15

Measured by IC

P-O

ES 38 r 2

90 r 05 69 r 03

41 r 2 38 r 02

137 r 007

Measured by ED

S 36 r 1

84 r 03 75 r 02

43 r 1 39 r 01

15 r 01

Created w

ith NE

TZSC

H P

roteus software

[] Type [11] D

ynamic

Range

2550(Km

in)1500 A

cqRate

7500 S

TC

0 P

1N2O

2 500

Corr

DS

C020

[] Type [13] D

ynamic

Range

150050(Km

in)25 A

cqRate

7500 S

TC

0 P

1N2O

2 500

Corr

DS

C020

Project

Identity D

atetime

Laboratory O

perator S

ample

G57

6282016 91511 AM

G

lenn Research C

enter C

osta G

57 4000 mg

Reference

Material

Corrtem

pcal S

ensfile S

ample carTC

M

odetype of meas R

ef Al2O

30 mg

baseline for YS

Z 5 C_m

in up tp 1500 C 06-24-16bd8 TC

ALZE

RO

TMX

sensitivity from


air 01-06-16ed8 D

SC

Cp S

S

DS

C sam

ple with correction

Segm

ents C

rucible A

tmosphere

M range

3 DS

CTG

pan Pt

N2O

2 500mlm

in 5000 microV

Instrument N

ETZS

CH

DS

C 404F1 File C

NE

TZSC

HP

roteusdata5CostaS

amplesG

62dd8 Rem

ark Third DS

C run since O


200 400

600 800

1000 1200

1400 Tem

perature degC

-10

-08

-06

-04

-02

00

02

04

DS

C (m

Wm

g)

0 50

100

150

200

250

Flow (m

lmin)

Main

exo

DSC

traces of CM


to 1500 qC at 5 qC

min

ww

wnasagov

6


inistration

Advanced N

AS

A E

BC

Developm

ents

Improved tem


perature strength

Advanced com


bined therm



ards prime-reliant

Gen I (E

PM)

RampD

Award

Gen II (U

EET)


(U

EET) 2000-2005 R

ampD Aw

ard (2007)

Advanced EBC (FAP)

2005-2011 R

ampD Aw


ent

Advanced EBC

(FAP -ERA)

2007 -present

Advanced (FAP ERA)

Patent13923450 PC


Engine C

omponents

Com

bustor C

ombustor

(Vane) C

ombustor

Vane Vane Blade

-VaneBlade EB

Cs

-Equivalent APS com

bustor EBC

s

Airfoil components

Top Coat

BSAS (APS) R

E2 Si2 O

7 or R

E2 SiO

5 (APS)

-(HfY

bGdY

) 2 O3

-ZrO2 H

fO2 +R

E

silicates -ZrO

2 HfO

2 +BS

AS

(APS and EBPVD

)

RE-H

fO2 -Alum

ino silicate

(APS andor 100

EB-

PVD)

RE-H

fO2 -X

advanced top coat R

E-HfO

2 Silica (EB

-PVD etc vapor

deposition)

Advanced EBC

s

Interlayer --

--R

E-HfO

2 ZrO2 -

aluminosilicate

layered systems

Nanocom


--

EBC

M

ullite+ BSAS R

E2 Si2 O

7 and or BSAS+M

ullite

RE

silicates or R

E-Hf m

ullite R

E doped m

ullite-HfO

2 or R

E silicates

Multi-com

ponent R

E silicate systems

Multicom

ponent R


grown

Bond C

oat Si

Si O

xide+Si bond coat

HfO

2 -Si-X

doped mulliteSi

SiC nanotube

Optim

ized HfO


RE-Si+H

f systems

Thickness 10-15 m

il 10-15 m

il 15-20 m

il 10 m

il 5 m

il 1 -3 m

ils

Surface T U


3000degF2400CM

C

2700degF2400F CM

C

2700-3000degF

Bond Coat T

Limited to

2462degF Lim

it to 2462degF

Limit to 2642degF



2700degF

Challenges overcom

e by advancem

ents

ww

wnasagov

7


inistration

CM

AS

Related D

egradations in EBC

s

Cross-section

50 mm

minus C

MAS effects

bull S


BC


More detrim


BC

s bull

CM

AS



AS

increase EB



barrier bullC

MA

S interactions w


omechanical fatigue


Accelerated C

MC

failure when C

MA

S intact w

ith CM

Cs


Coating

surface

EB

C and degradations

CM

AS induced m


ww

nasagov 8


inistration

CM

AS R


BCs -C

ontinued minus

CM

AS effects on EBC


bull S


aO2 and A

l2 O3 silicate

Phase diagram

s showing yttrium


ith SiO

2 NaO

and Al2 O

3

ww

wnasagov

9


inistration

CM

AS R


BCs -C

ontinued minus

CM

AS effects on EBC




1500degC in the R

E2 O

3 -A

l2 O3 -S

iO2 based system

s bull

Sm

aller ionic size RE



2 Si2 O7 -A

l6 Si2 O13 -

SiO2 system


Y Murakam

i and H Yam

amoto J C

eram Soc Jpn 101 [10] 1101-1106 (1993)

ww

wnasagov

10


inistration

Rare Earth D

issolutions in CM

AS Melts

ZrO2 -30Y

2 O3 -15Sm

2 O3 -15Yb

2 O3

ZrO2 -30Y

2 O3 -15N

d2 O

3 -15Yb2 O

3 -03Sc2 O

3

ZrO2 -96Y

2 O3 -22G

d2 O

3 -21Yb2 O

3





AS

m

elt for ZrO2 -R

E2 O

3 oxide systems

ZrO2 -R

EO15 -H

f more endotherm

ic



eramics and C

omposites 2016

ww

wnasagov

11

Front CM

AS side


inistration

CM

AS Related D

egradations in EBC

coated CM

Cs ndash


minusC

MAS effects on EB

C-C

MC




MC


EBC

coated CV

I-MI C

MC

with N

dYb silicate R


MC

2450degF

Front heated CM

AS

side B

ack cooled side

Creep strain

Time h

Front CM

AS

side

200h

05

ww

wnasagov

12


inistration

EBC

CM

AS

Surface Initial N


eactions ndash

Ytterbium


AM

S

ndash M


pared to yttrium

Ytterbium


AS m

elts 50 Y


MA

S melts 5 h

h 1300degC

1500degC$

Yttrium


MA

S Y


MA

S melts 5 h

melts 50 h 1300degC

1500degC

A



ww

nasagov 13


inistration

Rare E

arth Apatite G

rain Grow

th ndash

Grain grow


es

Ytterbium

silicate system

50 hr 150 hr

200 hr

200 hr50 hr

150 hr

Yttrium

silicate system$

ww

wnasagov

14


inistration

Effect of C

MA

S R

eactions on Grain B

oundary Phases

ndash C

MA


l2 O3

content (17-22 mole

) bull

Eutectic region w

ith high Al2 O


elting point bull

Loss of SiO

2 due to volatility

200 hr 1500degC

NA

SA

modified

CM

AS

Grain


SiO

2 and high A

lumina

ww

wnasagov

15


inistration

Rare E


MA

S M

elts ndash

Non stoichiom


AS


ndash D


in apatite bull

Average AE

OR

E2 O


MA

S system

bull

Average AE

OR

E2 O


MA

S system

C


SiO2



RE

2 O3

AEO

Yttrium

Silicate EBC

Com


Ytterbium

Silicate EBC

ww

wnasagov

16


inistration

Advanced N

AS

A E

BC

Developm

ents

NA

SA advanced E

BC

systems em


2 -and ZrO2 -R

E2 O

3 -

EBC layer 2 region

EB

Cs

Mol

Mol

SiO

2 EB

C system

RE

2 Si2-x O

7-2x such as (YbG

dY) 2 S

i2-x O7-2x



(YbGdY) 2 S

i2-x O7-2x in

CM

AS

1300degC

(a)

(b)

ww

wnasagov

17


inistration E

xample of N

AS

A A

dvanced Environm

ental Barrier C

oating on S

iCSiC

CM

C System

s

Advanced EB

C coated vanes

HfO

2 -(YbG

dY)2 O

3

(YbG

dY)2 Si2-x O

7-2x

RESi(O

)+Hf B

ond Coat

Gd Y

b Y

O

Si

Yb

Gd Y

Si

Hf

A


2 -Multicom

ponent Rare E

arth silicate EB

Cs used for fundam



d-YbO+H


oated onto SiC

SiC

CM


B-P

VD


ww

wnasagov

18


inistration

CM

AS

Resistant Tests

ndash JE


s at 2700F

Plasma sprayed (G

dY)2 Si2 O

7 2450 cycles



ycles EB

-PVD

(YbG

dY)2 Si2 O


2450 4450

450

Hybrid H



Hybrid H


cycles 100h

2450 4450

2450 with

CM

AS 2450

ww

wnasagov

19


inistration

High S

tability and CM

AS

Resistance are E


igh M

elting Point C

oating and Multi-C

omponent C

ompositions A

rea A

Area B

ndash G

enerally improved C

MA

S

resistance of NAS

A R

ESi

System

at 1500degC 100 hr

ndash S


Rare earth elem



~9mol

)


MA

S melts

EDS E

ww

wnasagov

20


inistration

Advanced E

BC

-CM

C S

ystem D


igh Cycle and

Low Fatigue D

urability in High H




BC

with H



VI-M

I CM

C



igh Cycle and Low


ed at Stress


z at EB

C and 1 hr therm


Tested EB

C surface tem


perature 1482degC

(2700degF) with C

MA

S

-D


-D



C-C

MC

system


Test Condition Sum

mary

-EB

CC

VI-M


Pa) R


al LC

F$-

TEB

C-surface 1537degC

(2800degF)$-

Tbond coat 1482degC

(2700degF)$-

Tback C

MC

surface 1250degC

(2282degF)

ww

wnasagov

21


inistration

Advanced E

BC

-CM

C Fatigue Test w

ith CM

AS

and in Steam

Jet Tested 300 h D

urability in High H


-A

dvanced Hf-N

dYb silicate-N

dYbS

i bond coat EB

C coatings on 3D

architecture C

VI-P

IP S

iC-S

iC C

MC

(EB

-PV

D processing)



Surface view C

MA

S 35m

gcm2)

Back view

CM

AS

35mgcm

2)

ww

wnasagov


inistration

EBC

System

Designs ndash E

ffects of Com


Com

positions -

An alternating H

fO2 -and R


-PV


fO2 -layer


EB

-PV

D P

rocessed EB

Cs alternating H



CM

AS


ww

wnasagov


inistration

Sum

mary

bullC

MA

S degradation rem



iCSiC

CM

C com

ponent systems

bullC

MA

S leads to low



s with

accelerated EBC

and CM

C degradations

bullN

AS

A advanced E

BC com


e promise for C

MA

S





BC com

positions and EBC

-CM

AS


zirconium and rare



AS

resistance bull

Also standardize C

MA


MA



bullC


MA

S resistance w

hile maintaining


ww

wnasagov

24


inistration

Acknow

ledgements

bullThe w


ASA Fundam




r Michael H


ww

wnasagov

25


inistration

CM

AS

Reaction K

inetics in Bond C

oats ndash S


MA

S m

elts ndash R


ndash M


plemented for im

proved thermom

echanical ndash

CM



100hr

RE incorporations

CM

AS

resistance

ww

wnasagov

26




Bond Coats

-CM

AS

Reaction R


Selected E

BC

systems

ndashH

fO2 -R

E-S




ndashC

MA



fO2


659-AE9762

150

EBC

s

EBC

s

HfO

2 -Si (Si-rich)

Yb

2 Si 2 O 7

250658-EBC H

fO2-Rare Earth-A

lumino Silicate

660-Y2Si2O


b2Si2O7

Strength MPa


100681-H

fO2-Si

669-9762 with CM


693-HfO

2-Si with CM


5000

200 400

600 800

1000 1200

1400 1600

Temperature degC


Yb

2 Si2 O7 C

MA

S reacted tensile Y

b2 Si2 O

7 CM

AS reacted


surface w

ww

nasagov 27


inistration


MAS R


the Rare

Earth S

ilicon High M

elting Point C

oating Com

positions

ndashD

emonstrated C

MA

S resistance

of NAS

A R

E-Si S

ystem at

1500degC 100 hr

ndash S


Rare earth elem




ol)

CM

AS m

elts

Area A

Area B

ww

wnasagov

28


inistration

Outline

bullN

ASA environm


) development the C

MAS


minus E

BC

systems

minus C

MA

S com

positions

bullSom

e generalized CM

AS related failures

bullC



) systems rare


Ytterbium


BC

s ndash

Som


s

bullC

urrent advanced EBC

s HfO



Som

e CM

AS


bull Sum

mary

ww

wnasagov

3


inistration

EBC-C

MA

S D


ith Increasing O


minusEm



durability of ceram



MA

S -


AS


Marcus P B

orom et al S

urf Coat

Technol 86-87 1996

Current airfoil C

MA

S attack

region -R D


aterials Review

s 2013

ww

wnasagov

4


inistration

Calcium

Magnesium

Alumino-Silicate (C

MAS) System

s Used


N

AS

A m

odified version (NA

SA

CM

AS



PTI 02 C

MA


ents minus

C

MA

S S


43-49 mole


iO

and FeO)

NA

SA m

odified CM

AS

AR

FL PTI CM

AS 02

(higher SiO2 )

GEB

orom

Wellm

an

Kram

er

Aygun Smialek

Rai

Braue

AR

FL PTI 11717A

02

Fully reacted A

s received

AFR

L02 particle size

distribution (34

Quartz 30

Gypsum

17

Aplite 14

Dolom

ite 5


) 10 25 +-10 50 85 +-20 90 405 +-30

Fully reacted C

MA

S EDS

ww

wnasagov

5


inistration

Calcium

Magnesium

Alumino-Silicate (C

MAS) System

s Used


minus

NA

SA

modified version (N

AS

A C

MA

S)

minus

CM

AS

SiO


ole such as N


iO

and FeO)

NA

SA

CM

AS

Com

positions

NA

SA m

odified CM

AS

AR

FL PTI CM

AS 02

(higher SiO2 )

GEB

orom

Wellm

an

Kram

er

Aygun Smialek

Rai

Braue

Method

Content (m

ol)

CaO

M

gO

Al2 O3

SiO2

Fe2 O

3 N

iO

(DesignedTargeted)

338 90

67 460

30 15

Measured by IC

P-O

ES 38 r 2

90 r 05 69 r 03

41 r 2 38 r 02

137 r 007

Measured by ED

S 36 r 1

84 r 03 75 r 02

43 r 1 39 r 01

15 r 01

Created w

ith NE

TZSC

H P

roteus software

[] Type [11] D

ynamic

Range

2550(Km

in)1500 A

cqRate

7500 S

TC

0 P

1N2O

2 500

Corr

DS

C020

[] Type [13] D

ynamic

Range

150050(Km

in)25 A

cqRate

7500 S

TC

0 P

1N2O

2 500

Corr

DS

C020

Project

Identity D

atetime

Laboratory O

perator S

ample

G57

6282016 91511 AM

G

lenn Research C

enter C

osta G

57 4000 mg

Reference

Material

Corrtem

pcal S

ensfile S

ample carTC

M

odetype of meas R

ef Al2O

30 mg

baseline for YS

Z 5 C_m

in up tp 1500 C 06-24-16bd8 TC

ALZE

RO

TMX

sensitivity from


air 01-06-16ed8 D

SC

Cp S

S

DS

C sam

ple with correction

Segm

ents C

rucible A

tmosphere

M range

3 DS

CTG

pan Pt

N2O

2 500mlm

in 5000 microV

Instrument N

ETZS

CH

DS

C 404F1 File C

NE

TZSC

HP

roteusdata5CostaS

amplesG

62dd8 Rem

ark Third DS

C run since O


200 400

600 800

1000 1200

1400 Tem

perature degC

-10

-08

-06

-04

-02

00

02

04

DS

C (m

Wm

g)

0 50

100

150

200

250

Flow (m

lmin)

Main

exo

DSC

traces of CM


to 1500 qC at 5 qC

min

ww

wnasagov

6


inistration

Advanced N

AS

A E

BC

Developm

ents

Improved tem


perature strength

Advanced com


bined therm



ards prime-reliant

Gen I (E

PM)

RampD

Award

Gen II (U

EET)


(U

EET) 2000-2005 R

ampD Aw

ard (2007)

Advanced EBC (FAP)

2005-2011 R

ampD Aw


ent

Advanced EBC

(FAP -ERA)

2007 -present

Advanced (FAP ERA)

Patent13923450 PC


Engine C

omponents

Com

bustor C

ombustor

(Vane) C

ombustor

Vane Vane Blade

-VaneBlade EB

Cs

-Equivalent APS com

bustor EBC

s

Airfoil components

Top Coat

BSAS (APS) R

E2 Si2 O

7 or R

E2 SiO

5 (APS)

-(HfY

bGdY

) 2 O3

-ZrO2 H

fO2 +R

E

silicates -ZrO

2 HfO

2 +BS

AS

(APS and EBPVD

)

RE-H

fO2 -Alum

ino silicate

(APS andor 100

EB-

PVD)

RE-H

fO2 -X

advanced top coat R

E-HfO

2 Silica (EB

-PVD etc vapor

deposition)

Advanced EBC

s

Interlayer --

--R

E-HfO

2 ZrO2 -

aluminosilicate

layered systems

Nanocom


--

EBC

M

ullite+ BSAS R

E2 Si2 O

7 and or BSAS+M

ullite

RE

silicates or R

E-Hf m

ullite R

E doped m

ullite-HfO

2 or R

E silicates

Multi-com

ponent R

E silicate systems

Multicom

ponent R


grown

Bond C

oat Si

Si O

xide+Si bond coat

HfO

2 -Si-X

doped mulliteSi

SiC nanotube

Optim

ized HfO


RE-Si+H

f systems

Thickness 10-15 m

il 10-15 m

il 15-20 m

il 10 m

il 5 m

il 1 -3 m

ils

Surface T U


3000degF2400CM

C

2700degF2400F CM

C

2700-3000degF

Bond Coat T

Limited to

2462degF Lim

it to 2462degF

Limit to 2642degF



2700degF

Challenges overcom

e by advancem

ents

ww

wnasagov

7


inistration

CM

AS

Related D

egradations in EBC

s

Cross-section

50 mm

minus C

MAS effects

bull S


BC


More detrim


BC

s bull

CM

AS



AS

increase EB



barrier bullC

MA

S interactions w


omechanical fatigue


Accelerated C

MC

failure when C

MA

S intact w

ith CM

Cs


Coating

surface

EB

C and degradations

CM

AS induced m


ww

nasagov 8


inistration

CM

AS R


BCs -C

ontinued minus

CM

AS effects on EBC


bull S


aO2 and A

l2 O3 silicate

Phase diagram

s showing yttrium


ith SiO

2 NaO

and Al2 O

3

ww

wnasagov

9


inistration

CM

AS R


BCs -C

ontinued minus

CM

AS effects on EBC




1500degC in the R

E2 O

3 -A

l2 O3 -S

iO2 based system

s bull

Sm

aller ionic size RE



2 Si2 O7 -A

l6 Si2 O13 -

SiO2 system


Y Murakam

i and H Yam

amoto J C

eram Soc Jpn 101 [10] 1101-1106 (1993)

ww

wnasagov

10


inistration

Rare Earth D

issolutions in CM

AS Melts

ZrO2 -30Y

2 O3 -15Sm

2 O3 -15Yb

2 O3

ZrO2 -30Y

2 O3 -15N

d2 O

3 -15Yb2 O

3 -03Sc2 O

3

ZrO2 -96Y

2 O3 -22G

d2 O

3 -21Yb2 O

3





AS

m

elt for ZrO2 -R

E2 O

3 oxide systems

ZrO2 -R

EO15 -H

f more endotherm

ic



eramics and C

omposites 2016

ww

wnasagov

11

Front CM

AS side


inistration

CM

AS Related D

egradations in EBC

coated CM

Cs ndash


minusC

MAS effects on EB

C-C

MC




MC


EBC

coated CV

I-MI C

MC

with N

dYb silicate R


MC

2450degF

Front heated CM

AS

side B

ack cooled side

Creep strain

Time h

Front CM

AS

side

200h

05

ww

wnasagov

12


inistration

EBC

CM

AS

Surface Initial N


eactions ndash

Ytterbium


AM

S

ndash M


pared to yttrium

Ytterbium


AS m

elts 50 Y


MA

S melts 5 h

h 1300degC

1500degC$

Yttrium


MA

S Y


MA

S melts 5 h

melts 50 h 1300degC

1500degC

A



ww

nasagov 13


inistration

Rare E

arth Apatite G

rain Grow

th ndash

Grain grow


es

Ytterbium

silicate system

50 hr 150 hr

200 hr

200 hr50 hr

150 hr

Yttrium

silicate system$

ww

wnasagov

14


inistration

Effect of C

MA

S R

eactions on Grain B

oundary Phases

ndash C

MA


l2 O3

content (17-22 mole

) bull

Eutectic region w

ith high Al2 O


elting point bull

Loss of SiO

2 due to volatility

200 hr 1500degC

NA

SA

modified

CM

AS

Grain


SiO

2 and high A

lumina

ww

wnasagov

15


inistration

Rare E


MA

S M

elts ndash

Non stoichiom


AS


ndash D


in apatite bull

Average AE

OR

E2 O


MA

S system

bull

Average AE

OR

E2 O


MA

S system

C


SiO2



RE

2 O3

AEO

Yttrium

Silicate EBC

Com


Ytterbium

Silicate EBC

ww

wnasagov

16


inistration

Advanced N

AS

A E

BC

Developm

ents

NA

SA advanced E

BC

systems em


2 -and ZrO2 -R

E2 O

3 -

EBC layer 2 region

EB

Cs

Mol

Mol

SiO

2 EB

C system

RE

2 Si2-x O

7-2x such as (YbG

dY) 2 S

i2-x O7-2x



(YbGdY) 2 S

i2-x O7-2x in

CM

AS

1300degC

(a)

(b)

ww

wnasagov

17


inistration E

xample of N

AS

A A

dvanced Environm

ental Barrier C

oating on S

iCSiC

CM

C System

s

Advanced EB

C coated vanes

HfO

2 -(YbG

dY)2 O

3

(YbG

dY)2 Si2-x O

7-2x

RESi(O

)+Hf B

ond Coat

Gd Y

b Y

O

Si

Yb

Gd Y

Si

Hf

A


2 -Multicom

ponent Rare E

arth silicate EB

Cs used for fundam



d-YbO+H


oated onto SiC

SiC

CM


B-P

VD


ww

wnasagov

18


inistration

CM

AS

Resistant Tests

ndash JE


s at 2700F

Plasma sprayed (G

dY)2 Si2 O

7 2450 cycles



ycles EB

-PVD

(YbG

dY)2 Si2 O


2450 4450

450

Hybrid H



Hybrid H


cycles 100h

2450 4450

2450 with

CM

AS 2450

ww

wnasagov

19


inistration

High S

tability and CM

AS

Resistance are E


igh M

elting Point C

oating and Multi-C

omponent C

ompositions A

rea A

Area B

ndash G

enerally improved C

MA

S

resistance of NAS

A R

ESi

System

at 1500degC 100 hr

ndash S


Rare earth elem



~9mol

)


MA

S melts

EDS E

ww

wnasagov

20


inistration

Advanced E

BC

-CM

C S

ystem D


igh Cycle and

Low Fatigue D

urability in High H




BC

with H



VI-M

I CM

C



igh Cycle and Low


ed at Stress


z at EB

C and 1 hr therm


Tested EB

C surface tem


perature 1482degC

(2700degF) with C

MA

S

-D


-D



C-C

MC

system


Test Condition Sum

mary

-EB

CC

VI-M


Pa) R


al LC

F$-

TEB

C-surface 1537degC

(2800degF)$-

Tbond coat 1482degC

(2700degF)$-

Tback C

MC

surface 1250degC

(2282degF)

ww

wnasagov

21


inistration

Advanced E

BC

-CM

C Fatigue Test w

ith CM

AS

and in Steam

Jet Tested 300 h D

urability in High H


-A

dvanced Hf-N

dYb silicate-N

dYbS

i bond coat EB

C coatings on 3D

architecture C

VI-P

IP S

iC-S

iC C

MC

(EB

-PV

D processing)



Surface view C

MA

S 35m

gcm2)

Back view

CM

AS

35mgcm

2)

ww

wnasagov


inistration

EBC

System

Designs ndash E

ffects of Com


Com

positions -

An alternating H

fO2 -and R


-PV


fO2 -layer


EB

-PV

D P

rocessed EB

Cs alternating H



CM

AS


ww

wnasagov


inistration

Sum

mary

bullC

MA

S degradation rem



iCSiC

CM

C com

ponent systems

bullC

MA

S leads to low



s with

accelerated EBC

and CM

C degradations

bullN

AS

A advanced E

BC com


e promise for C

MA

S





BC com

positions and EBC

-CM

AS


zirconium and rare



AS

resistance bull

Also standardize C

MA


MA



bullC


MA

S resistance w

hile maintaining


ww

wnasagov

24


inistration

Acknow

ledgements

bullThe w


ASA Fundam




r Michael H


ww

wnasagov

25


inistration

CM

AS

Reaction K

inetics in Bond C

oats ndash S


MA

S m

elts ndash R


ndash M


plemented for im

proved thermom

echanical ndash

CM



100hr

RE incorporations

CM

AS

resistance

ww

wnasagov

26




Bond Coats

-CM

AS

Reaction R


Selected E

BC

systems

ndashH

fO2 -R

E-S




ndashC

MA



fO2


659-AE9762

150

EBC

s

EBC

s

HfO

2 -Si (Si-rich)

Yb

2 Si 2 O 7

250658-EBC H

fO2-Rare Earth-A

lumino Silicate

660-Y2Si2O


b2Si2O7

Strength MPa


100681-H

fO2-Si

669-9762 with CM


693-HfO

2-Si with CM


5000

200 400

600 800

1000 1200

1400 1600

Temperature degC


Yb

2 Si2 O7 C

MA

S reacted tensile Y

b2 Si2 O

7 CM

AS reacted


surface w

ww

nasagov 27


inistration


MAS R


the Rare

Earth S

ilicon High M

elting Point C

oating Com

positions

ndashD

emonstrated C

MA

S resistance

of NAS

A R

E-Si S

ystem at

1500degC 100 hr

ndash S


Rare earth elem




ol)

CM

AS m

elts

Area A

Area B

ww

wnasagov

28


inistration

EBC-C

MA

S D


ith Increasing O


minusEm



durability of ceram



MA

S -


AS


Marcus P B

orom et al S

urf Coat

Technol 86-87 1996

Current airfoil C

MA

S attack

region -R D


aterials Review

s 2013

ww

wnasagov

4


inistration

Calcium

Magnesium

Alumino-Silicate (C

MAS) System

s Used


N

AS

A m

odified version (NA

SA

CM

AS



PTI 02 C

MA


ents minus

C

MA

S S


43-49 mole


iO

and FeO)

NA

SA m

odified CM

AS

AR

FL PTI CM

AS 02

(higher SiO2 )

GEB

orom

Wellm

an

Kram

er

Aygun Smialek

Rai

Braue

AR

FL PTI 11717A

02

Fully reacted A

s received

AFR

L02 particle size

distribution (34

Quartz 30

Gypsum

17

Aplite 14

Dolom

ite 5


) 10 25 +-10 50 85 +-20 90 405 +-30

Fully reacted C

MA

S EDS

ww

wnasagov

5


inistration

Calcium

Magnesium

Alumino-Silicate (C

MAS) System

s Used


minus

NA

SA

modified version (N

AS

A C

MA

S)

minus

CM

AS

SiO


ole such as N


iO

and FeO)

NA

SA

CM

AS

Com

positions

NA

SA m

odified CM

AS

AR

FL PTI CM

AS 02

(higher SiO2 )

GEB

orom

Wellm

an

Kram

er

Aygun Smialek

Rai

Braue

Method

Content (m

ol)

CaO

M

gO

Al2 O3

SiO2

Fe2 O

3 N

iO

(DesignedTargeted)

338 90

67 460

30 15

Measured by IC

P-O

ES 38 r 2

90 r 05 69 r 03

41 r 2 38 r 02

137 r 007

Measured by ED

S 36 r 1

84 r 03 75 r 02

43 r 1 39 r 01

15 r 01

Created w

ith NE

TZSC

H P

roteus software

[] Type [11] D

ynamic

Range

2550(Km

in)1500 A

cqRate

7500 S

TC

0 P

1N2O

2 500

Corr

DS

C020

[] Type [13] D

ynamic

Range

150050(Km

in)25 A

cqRate

7500 S

TC

0 P

1N2O

2 500

Corr

DS

C020

Project

Identity D

atetime

Laboratory O

perator S

ample

G57

6282016 91511 AM

G

lenn Research C

enter C

osta G

57 4000 mg

Reference

Material

Corrtem

pcal S

ensfile S

ample carTC

M

odetype of meas R

ef Al2O

30 mg

baseline for YS

Z 5 C_m

in up tp 1500 C 06-24-16bd8 TC

ALZE

RO

TMX

sensitivity from


air 01-06-16ed8 D

SC

Cp S

S

DS

C sam

ple with correction

Segm

ents C

rucible A

tmosphere

M range

3 DS

CTG

pan Pt

N2O

2 500mlm

in 5000 microV

Instrument N

ETZS

CH

DS

C 404F1 File C

NE

TZSC

HP

roteusdata5CostaS

amplesG

62dd8 Rem

ark Third DS

C run since O


200 400

600 800

1000 1200

1400 Tem

perature degC

-10

-08

-06

-04

-02

00

02

04

DS

C (m

Wm

g)

0 50

100

150

200

250

Flow (m

lmin)

Main

exo

DSC

traces of CM


to 1500 qC at 5 qC

min

ww

wnasagov

6


inistration

Advanced N

AS

A E

BC

Developm

ents

Improved tem


perature strength

Advanced com


bined therm



ards prime-reliant

Gen I (E

PM)

RampD

Award

Gen II (U

EET)


(U

EET) 2000-2005 R

ampD Aw

ard (2007)

Advanced EBC (FAP)

2005-2011 R

ampD Aw


ent

Advanced EBC

(FAP -ERA)

2007 -present

Advanced (FAP ERA)

Patent13923450 PC


Engine C

omponents

Com

bustor C

ombustor

(Vane) C

ombustor

Vane Vane Blade

-VaneBlade EB

Cs

-Equivalent APS com

bustor EBC

s

Airfoil components

Top Coat

BSAS (APS) R

E2 Si2 O

7 or R

E2 SiO

5 (APS)

-(HfY

bGdY

) 2 O3

-ZrO2 H

fO2 +R

E

silicates -ZrO

2 HfO

2 +BS

AS

(APS and EBPVD

)

RE-H

fO2 -Alum

ino silicate

(APS andor 100

EB-

PVD)

RE-H

fO2 -X

advanced top coat R

E-HfO

2 Silica (EB

-PVD etc vapor

deposition)

Advanced EBC

s

Interlayer --

--R

E-HfO

2 ZrO2 -

aluminosilicate

layered systems

Nanocom


--

EBC

M

ullite+ BSAS R

E2 Si2 O

7 and or BSAS+M

ullite

RE

silicates or R

E-Hf m

ullite R

E doped m

ullite-HfO

2 or R

E silicates

Multi-com

ponent R

E silicate systems

Multicom

ponent R


grown

Bond C

oat Si

Si O

xide+Si bond coat

HfO

2 -Si-X

doped mulliteSi

SiC nanotube

Optim

ized HfO


RE-Si+H

f systems

Thickness 10-15 m

il 10-15 m

il 15-20 m

il 10 m

il 5 m

il 1 -3 m

ils

Surface T U


3000degF2400CM

C

2700degF2400F CM

C

2700-3000degF

Bond Coat T

Limited to

2462degF Lim

it to 2462degF

Limit to 2642degF



2700degF

Challenges overcom

e by advancem

ents

ww

wnasagov

7


inistration

CM

AS

Related D

egradations in EBC

s

Cross-section

50 mm

minus C

MAS effects

bull S


BC


More detrim


BC

s bull

CM

AS



AS

increase EB



barrier bullC

MA

S interactions w


omechanical fatigue


Accelerated C

MC

failure when C

MA

S intact w

ith CM

Cs


Coating

surface

EB

C and degradations

CM

AS induced m


ww

nasagov 8


inistration

CM

AS R


BCs -C

ontinued minus

CM

AS effects on EBC


bull S


aO2 and A

l2 O3 silicate

Phase diagram

s showing yttrium


ith SiO

2 NaO

and Al2 O

3

ww

wnasagov

9


inistration

CM

AS R


BCs -C

ontinued minus

CM

AS effects on EBC




1500degC in the R

E2 O

3 -A

l2 O3 -S

iO2 based system

s bull

Sm

aller ionic size RE



2 Si2 O7 -A

l6 Si2 O13 -

SiO2 system


Y Murakam

i and H Yam

amoto J C

eram Soc Jpn 101 [10] 1101-1106 (1993)

ww

wnasagov

10


inistration

Rare Earth D

issolutions in CM

AS Melts

ZrO2 -30Y

2 O3 -15Sm

2 O3 -15Yb

2 O3

ZrO2 -30Y

2 O3 -15N

d2 O

3 -15Yb2 O

3 -03Sc2 O

3

ZrO2 -96Y

2 O3 -22G

d2 O

3 -21Yb2 O

3





AS

m

elt for ZrO2 -R

E2 O

3 oxide systems

ZrO2 -R

EO15 -H

f more endotherm

ic



eramics and C

omposites 2016

ww

wnasagov

11

Front CM

AS side


inistration

CM

AS Related D

egradations in EBC

coated CM

Cs ndash


minusC

MAS effects on EB

C-C

MC




MC


EBC

coated CV

I-MI C

MC

with N

dYb silicate R


MC

2450degF

Front heated CM

AS

side B

ack cooled side

Creep strain

Time h

Front CM

AS

side

200h

05

ww

wnasagov

12


inistration

EBC

CM

AS

Surface Initial N


eactions ndash

Ytterbium


AM

S

ndash M


pared to yttrium

Ytterbium


AS m

elts 50 Y


MA

S melts 5 h

h 1300degC

1500degC$

Yttrium


MA

S Y


MA

S melts 5 h

melts 50 h 1300degC

1500degC

A



ww

nasagov 13


inistration

Rare E

arth Apatite G

rain Grow

th ndash

Grain grow


es

Ytterbium

silicate system

50 hr 150 hr

200 hr

200 hr50 hr

150 hr

Yttrium

silicate system$

ww

wnasagov

14


inistration

Effect of C

MA

S R

eactions on Grain B

oundary Phases

ndash C

MA


l2 O3

content (17-22 mole

) bull

Eutectic region w

ith high Al2 O


elting point bull

Loss of SiO

2 due to volatility

200 hr 1500degC

NA

SA

modified

CM

AS

Grain


SiO

2 and high A

lumina

ww

wnasagov

15


inistration

Rare E


MA

S M

elts ndash

Non stoichiom


AS


ndash D


in apatite bull

Average AE

OR

E2 O


MA

S system

bull

Average AE

OR

E2 O


MA

S system

C


SiO2



RE

2 O3

AEO

Yttrium

Silicate EBC

Com


Ytterbium

Silicate EBC

ww

wnasagov

16


inistration

Advanced N

AS

A E

BC

Developm

ents

NA

SA advanced E

BC

systems em


2 -and ZrO2 -R

E2 O

3 -

EBC layer 2 region

EB

Cs

Mol

Mol

SiO

2 EB

C system

RE

2 Si2-x O

7-2x such as (YbG

dY) 2 S

i2-x O7-2x



(YbGdY) 2 S

i2-x O7-2x in

CM

AS

1300degC

(a)

(b)

ww

wnasagov

17


inistration E

xample of N

AS

A A

dvanced Environm

ental Barrier C

oating on S

iCSiC

CM

C System

s

Advanced EB

C coated vanes

HfO

2 -(YbG

dY)2 O

3

(YbG

dY)2 Si2-x O

7-2x

RESi(O

)+Hf B

ond Coat

Gd Y

b Y

O

Si

Yb

Gd Y

Si

Hf

A


2 -Multicom

ponent Rare E

arth silicate EB

Cs used for fundam



d-YbO+H


oated onto SiC

SiC

CM


B-P

VD


ww

wnasagov

18


inistration

CM

AS

Resistant Tests

ndash JE


s at 2700F

Plasma sprayed (G

dY)2 Si2 O

7 2450 cycles



ycles EB

-PVD

(YbG

dY)2 Si2 O


2450 4450

450

Hybrid H



Hybrid H


cycles 100h

2450 4450

2450 with

CM

AS 2450

ww

wnasagov

19


inistration

High S

tability and CM

AS

Resistance are E


igh M

elting Point C

oating and Multi-C

omponent C

ompositions A

rea A

Area B

ndash G

enerally improved C

MA

S

resistance of NAS

A R

ESi

System

at 1500degC 100 hr

ndash S


Rare earth elem



~9mol

)


MA

S melts

EDS E

ww

wnasagov

20


inistration

Advanced E

BC

-CM

C S

ystem D


igh Cycle and

Low Fatigue D

urability in High H




BC

with H



VI-M

I CM

C



igh Cycle and Low


ed at Stress


z at EB

C and 1 hr therm


Tested EB

C surface tem


perature 1482degC

(2700degF) with C

MA

S

-D


-D



C-C

MC

system


Test Condition Sum

mary

-EB

CC

VI-M


Pa) R


al LC

F$-

TEB

C-surface 1537degC

(2800degF)$-

Tbond coat 1482degC

(2700degF)$-

Tback C

MC

surface 1250degC

(2282degF)

ww

wnasagov

21


inistration

Advanced E

BC

-CM

C Fatigue Test w

ith CM

AS

and in Steam

Jet Tested 300 h D

urability in High H


-A

dvanced Hf-N

dYb silicate-N

dYbS

i bond coat EB

C coatings on 3D

architecture C

VI-P

IP S

iC-S

iC C

MC

(EB

-PV

D processing)



Surface view C

MA

S 35m

gcm2)

Back view

CM

AS

35mgcm

2)

ww

wnasagov


inistration

EBC

System

Designs ndash E

ffects of Com


Com

positions -

An alternating H

fO2 -and R


-PV


fO2 -layer


EB

-PV

D P

rocessed EB

Cs alternating H



CM

AS


ww

wnasagov


inistration

Sum

mary

bullC

MA

S degradation rem



iCSiC

CM

C com

ponent systems

bullC

MA

S leads to low



s with

accelerated EBC

and CM

C degradations

bullN

AS

A advanced E

BC com


e promise for C

MA

S





BC com

positions and EBC

-CM

AS


zirconium and rare



AS

resistance bull

Also standardize C

MA


MA



bullC


MA

S resistance w

hile maintaining


ww

wnasagov

24


inistration

Acknow

ledgements

bullThe w


ASA Fundam




r Michael H


ww

wnasagov

25


inistration

CM

AS

Reaction K

inetics in Bond C

oats ndash S


MA

S m

elts ndash R


ndash M


plemented for im

proved thermom

echanical ndash

CM



100hr

RE incorporations

CM

AS

resistance

ww

wnasagov

26




Bond Coats

-CM

AS

Reaction R


Selected E

BC

systems

ndashH

fO2 -R

E-S




ndashC

MA



fO2


659-AE9762

150

EBC

s

EBC

s

HfO

2 -Si (Si-rich)

Yb

2 Si 2 O 7

250658-EBC H

fO2-Rare Earth-A

lumino Silicate

660-Y2Si2O


b2Si2O7

Strength MPa


100681-H

fO2-Si

669-9762 with CM


693-HfO

2-Si with CM


5000

200 400

600 800

1000 1200

1400 1600

Temperature degC


Yb

2 Si2 O7 C

MA

S reacted tensile Y

b2 Si2 O

7 CM

AS reacted


surface w

ww

nasagov 27


inistration


MAS R


the Rare

Earth S

ilicon High M

elting Point C

oating Com

positions

ndashD

emonstrated C

MA

S resistance

of NAS

A R

E-Si S

ystem at

1500degC 100 hr

ndash S


Rare earth elem




ol)

CM

AS m

elts

Area A

Area B

ww

wnasagov

28


inistration

Calcium

Magnesium

Alumino-Silicate (C

MAS) System

s Used


N

AS

A m

odified version (NA

SA

CM

AS



PTI 02 C

MA


ents minus

C

MA

S S


43-49 mole


iO

and FeO)

NA

SA m

odified CM

AS

AR

FL PTI CM

AS 02

(higher SiO2 )

GEB

orom

Wellm

an

Kram

er

Aygun Smialek

Rai

Braue

AR

FL PTI 11717A

02

Fully reacted A

s received

AFR

L02 particle size

distribution (34

Quartz 30

Gypsum

17

Aplite 14

Dolom

ite 5


) 10 25 +-10 50 85 +-20 90 405 +-30

Fully reacted C

MA

S EDS

ww

wnasagov

5


inistration

Calcium

Magnesium

Alumino-Silicate (C

MAS) System

s Used


minus

NA

SA

modified version (N

AS

A C

MA

S)

minus

CM

AS

SiO


ole such as N


iO

and FeO)

NA

SA

CM

AS

Com

positions

NA

SA m

odified CM

AS

AR

FL PTI CM

AS 02

(higher SiO2 )

GEB

orom

Wellm

an

Kram

er

Aygun Smialek

Rai

Braue

Method

Content (m

ol)

CaO

M

gO

Al2 O3

SiO2

Fe2 O

3 N

iO

(DesignedTargeted)

338 90

67 460

30 15

Measured by IC

P-O

ES 38 r 2

90 r 05 69 r 03

41 r 2 38 r 02

137 r 007

Measured by ED

S 36 r 1

84 r 03 75 r 02

43 r 1 39 r 01

15 r 01

Created w

ith NE

TZSC

H P

roteus software

[] Type [11] D

ynamic

Range

2550(Km

in)1500 A

cqRate

7500 S

TC

0 P

1N2O

2 500

Corr

DS

C020

[] Type [13] D

ynamic

Range

150050(Km

in)25 A

cqRate

7500 S

TC

0 P

1N2O

2 500

Corr

DS

C020

Project

Identity D

atetime

Laboratory O

perator S

ample

G57

6282016 91511 AM

G

lenn Research C

enter C

osta G

57 4000 mg

Reference

Material

Corrtem

pcal S

ensfile S

ample carTC

M

odetype of meas R

ef Al2O

30 mg

baseline for YS

Z 5 C_m

in up tp 1500 C 06-24-16bd8 TC

ALZE

RO

TMX

sensitivity from


air 01-06-16ed8 D

SC

Cp S

S

DS

C sam

ple with correction

Segm

ents C

rucible A

tmosphere

M range

3 DS

CTG

pan Pt

N2O

2 500mlm

in 5000 microV

Instrument N

ETZS

CH

DS

C 404F1 File C

NE

TZSC

HP

roteusdata5CostaS

amplesG

62dd8 Rem

ark Third DS

C run since O


200 400

600 800

1000 1200

1400 Tem

perature degC

-10

-08

-06

-04

-02

00

02

04

DS

C (m

Wm

g)

0 50

100

150

200

250

Flow (m

lmin)

Main

exo

DSC

traces of CM


to 1500 qC at 5 qC

min

ww

wnasagov

6


inistration

Advanced N

AS

A E

BC

Developm

ents

Improved tem


perature strength

Advanced com


bined therm



ards prime-reliant

Gen I (E

PM)

RampD

Award

Gen II (U

EET)


(U

EET) 2000-2005 R

ampD Aw

ard (2007)

Advanced EBC (FAP)

2005-2011 R

ampD Aw


ent

Advanced EBC

(FAP -ERA)

2007 -present

Advanced (FAP ERA)

Patent13923450 PC


Engine C

omponents

Com

bustor C

ombustor

(Vane) C

ombustor

Vane Vane Blade

-VaneBlade EB

Cs

-Equivalent APS com

bustor EBC

s

Airfoil components

Top Coat

BSAS (APS) R

E2 Si2 O

7 or R

E2 SiO

5 (APS)

-(HfY

bGdY

) 2 O3

-ZrO2 H

fO2 +R

E

silicates -ZrO

2 HfO

2 +BS

AS

(APS and EBPVD

)

RE-H

fO2 -Alum

ino silicate

(APS andor 100

EB-

PVD)

RE-H

fO2 -X

advanced top coat R

E-HfO

2 Silica (EB

-PVD etc vapor

deposition)

Advanced EBC

s

Interlayer --

--R

E-HfO

2 ZrO2 -

aluminosilicate

layered systems

Nanocom


--

EBC

M

ullite+ BSAS R

E2 Si2 O

7 and or BSAS+M

ullite

RE

silicates or R

E-Hf m

ullite R

E doped m

ullite-HfO

2 or R

E silicates

Multi-com

ponent R

E silicate systems

Multicom

ponent R


grown

Bond C

oat Si

Si O

xide+Si bond coat

HfO

2 -Si-X

doped mulliteSi

SiC nanotube

Optim

ized HfO


RE-Si+H

f systems

Thickness 10-15 m

il 10-15 m

il 15-20 m

il 10 m

il 5 m

il 1 -3 m

ils

Surface T U


3000degF2400CM

C

2700degF2400F CM

C

2700-3000degF

Bond Coat T

Limited to

2462degF Lim

it to 2462degF

Limit to 2642degF



2700degF

Challenges overcom

e by advancem

ents

ww

wnasagov

7


inistration

CM

AS

Related D

egradations in EBC

s

Cross-section

50 mm

minus C

MAS effects

bull S


BC


More detrim


BC

s bull

CM

AS



AS

increase EB



barrier bullC

MA

S interactions w


omechanical fatigue


Accelerated C

MC

failure when C

MA

S intact w

ith CM

Cs


Coating

surface

EB

C and degradations

CM

AS induced m


ww

nasagov 8


inistration

CM

AS R


BCs -C

ontinued minus

CM

AS effects on EBC


bull S


aO2 and A

l2 O3 silicate

Phase diagram

s showing yttrium


ith SiO

2 NaO

and Al2 O

3

ww

wnasagov

9


inistration

CM

AS R


BCs -C

ontinued minus

CM

AS effects on EBC




1500degC in the R

E2 O

3 -A

l2 O3 -S

iO2 based system

s bull

Sm

aller ionic size RE



2 Si2 O7 -A

l6 Si2 O13 -

SiO2 system


Y Murakam

i and H Yam

amoto J C

eram Soc Jpn 101 [10] 1101-1106 (1993)

ww

wnasagov

10


inistration

Rare Earth D

issolutions in CM

AS Melts

ZrO2 -30Y

2 O3 -15Sm

2 O3 -15Yb

2 O3

ZrO2 -30Y

2 O3 -15N

d2 O

3 -15Yb2 O

3 -03Sc2 O

3

ZrO2 -96Y

2 O3 -22G

d2 O

3 -21Yb2 O

3





AS

m

elt for ZrO2 -R

E2 O

3 oxide systems

ZrO2 -R

EO15 -H

f more endotherm

ic



eramics and C

omposites 2016

ww

wnasagov

11

Front CM

AS side


inistration

CM

AS Related D

egradations in EBC

coated CM

Cs ndash


minusC

MAS effects on EB

C-C

MC




MC


EBC

coated CV

I-MI C

MC

with N

dYb silicate R


MC

2450degF

Front heated CM

AS

side B

ack cooled side

Creep strain

Time h

Front CM

AS

side

200h

05

ww

wnasagov

12


inistration

EBC

CM

AS

Surface Initial N


eactions ndash

Ytterbium


AM

S

ndash M


pared to yttrium

Ytterbium


AS m

elts 50 Y


MA

S melts 5 h

h 1300degC

1500degC$

Yttrium


MA

S Y


MA

S melts 5 h

melts 50 h 1300degC

1500degC

A



ww

nasagov 13


inistration

Rare E

arth Apatite G

rain Grow

th ndash

Grain grow


es

Ytterbium

silicate system

50 hr 150 hr

200 hr

200 hr50 hr

150 hr

Yttrium

silicate system$

ww

wnasagov

14


inistration

Effect of C

MA

S R

eactions on Grain B

oundary Phases

ndash C

MA


l2 O3

content (17-22 mole

) bull

Eutectic region w

ith high Al2 O


elting point bull

Loss of SiO

2 due to volatility

200 hr 1500degC

NA

SA

modified

CM

AS

Grain


SiO

2 and high A

lumina

ww

wnasagov

15


inistration

Rare E


MA

S M

elts ndash

Non stoichiom


AS


ndash D


in apatite bull

Average AE

OR

E2 O


MA

S system

bull

Average AE

OR

E2 O


MA

S system

C


SiO2



RE

2 O3

AEO

Yttrium

Silicate EBC

Com


Ytterbium

Silicate EBC

ww

wnasagov

16


inistration

Advanced N

AS

A E

BC

Developm

ents

NA

SA advanced E

BC

systems em


2 -and ZrO2 -R

E2 O

3 -

EBC layer 2 region

EB

Cs

Mol

Mol

SiO

2 EB

C system

RE

2 Si2-x O

7-2x such as (YbG

dY) 2 S

i2-x O7-2x



(YbGdY) 2 S

i2-x O7-2x in

CM

AS

1300degC

(a)

(b)

ww

wnasagov

17


inistration E

xample of N

AS

A A

dvanced Environm

ental Barrier C

oating on S

iCSiC

CM

C System

s

Advanced EB

C coated vanes

HfO

2 -(YbG

dY)2 O

3

(YbG

dY)2 Si2-x O

7-2x

RESi(O

)+Hf B

ond Coat

Gd Y

b Y

O

Si

Yb

Gd Y

Si

Hf

A


2 -Multicom

ponent Rare E

arth silicate EB

Cs used for fundam



d-YbO+H


oated onto SiC

SiC

CM


B-P

VD


ww

wnasagov

18


inistration

CM

AS

Resistant Tests

ndash JE


s at 2700F

Plasma sprayed (G

dY)2 Si2 O

7 2450 cycles



ycles EB

-PVD

(YbG

dY)2 Si2 O


2450 4450

450

Hybrid H



Hybrid H


cycles 100h

2450 4450

2450 with

CM

AS 2450

ww

wnasagov

19


inistration

High S

tability and CM

AS

Resistance are E


igh M

elting Point C

oating and Multi-C

omponent C

ompositions A

rea A

Area B

ndash G

enerally improved C

MA

S

resistance of NAS

A R

ESi

System

at 1500degC 100 hr

ndash S


Rare earth elem



~9mol

)


MA

S melts

EDS E

ww

wnasagov

20


inistration

Advanced E

BC

-CM

C S

ystem D


igh Cycle and

Low Fatigue D

urability in High H




BC

with H



VI-M

I CM

C



igh Cycle and Low


ed at Stress


z at EB

C and 1 hr therm


Tested EB

C surface tem


perature 1482degC

(2700degF) with C

MA

S

-D


-D



C-C

MC

system


Test Condition Sum

mary

-EB

CC

VI-M


Pa) R


al LC

F$-

TEB

C-surface 1537degC

(2800degF)$-

Tbond coat 1482degC

(2700degF)$-

Tback C

MC

surface 1250degC

(2282degF)

ww

wnasagov

21


inistration

Advanced E

BC

-CM

C Fatigue Test w

ith CM

AS

and in Steam

Jet Tested 300 h D

urability in High H


-A

dvanced Hf-N

dYb silicate-N

dYbS

i bond coat EB

C coatings on 3D

architecture C

VI-P

IP S

iC-S

iC C

MC

(EB

-PV

D processing)



Surface view C

MA

S 35m

gcm2)

Back view

CM

AS

35mgcm

2)

ww

wnasagov


inistration

EBC

System

Designs ndash E

ffects of Com


Com

positions -

An alternating H

fO2 -and R


-PV


fO2 -layer


EB

-PV

D P

rocessed EB

Cs alternating H



CM

AS


ww

wnasagov


inistration

Sum

mary

bullC

MA

S degradation rem



iCSiC

CM

C com

ponent systems

bullC

MA

S leads to low



s with

accelerated EBC

and CM

C degradations

bullN

AS

A advanced E

BC com


e promise for C

MA

S





BC com

positions and EBC

-CM

AS


zirconium and rare



AS

resistance bull

Also standardize C

MA


MA



bullC


MA

S resistance w

hile maintaining


ww

wnasagov

24


inistration

Acknow

ledgements

bullThe w


ASA Fundam




r Michael H


ww

wnasagov

25


inistration

CM

AS

Reaction K

inetics in Bond C

oats ndash S


MA

S m

elts ndash R


ndash M


plemented for im

proved thermom

echanical ndash

CM



100hr

RE incorporations

CM

AS

resistance

ww

wnasagov

26




Bond Coats

-CM

AS

Reaction R


Selected E

BC

systems

ndashH

fO2 -R

E-S




ndashC

MA



fO2


659-AE9762

150

EBC

s

EBC

s

HfO

2 -Si (Si-rich)

Yb

2 Si 2 O 7

250658-EBC H

fO2-Rare Earth-A

lumino Silicate

660-Y2Si2O


b2Si2O7

Strength MPa


100681-H

fO2-Si

669-9762 with CM


693-HfO

2-Si with CM


5000

200 400

600 800

1000 1200

1400 1600

Temperature degC


Yb

2 Si2 O7 C

MA

S reacted tensile Y

b2 Si2 O

7 CM

AS reacted


surface w

ww

nasagov 27


inistration


MAS R


the Rare

Earth S

ilicon High M

elting Point C

oating Com

positions

ndashD

emonstrated C

MA

S resistance

of NAS

A R

E-Si S

ystem at

1500degC 100 hr

ndash S


Rare earth elem




ol)

CM

AS m

elts

Area A

Area B

ww

wnasagov

28


inistration

Calcium

Magnesium

Alumino-Silicate (C

MAS) System

s Used


minus

NA

SA

modified version (N

AS

A C

MA

S)

minus

CM

AS

SiO


ole such as N


iO

and FeO)

NA

SA

CM

AS

Com

positions

NA

SA m

odified CM

AS

AR

FL PTI CM

AS 02

(higher SiO2 )

GEB

orom

Wellm

an

Kram

er

Aygun Smialek

Rai

Braue

Method

Content (m

ol)

CaO

M

gO

Al2 O3

SiO2

Fe2 O

3 N

iO

(DesignedTargeted)

338 90

67 460

30 15

Measured by IC

P-O

ES 38 r 2

90 r 05 69 r 03

41 r 2 38 r 02

137 r 007

Measured by ED

S 36 r 1

84 r 03 75 r 02

43 r 1 39 r 01

15 r 01

Created w

ith NE

TZSC

H P

roteus software

[] Type [11] D

ynamic

Range

2550(Km

in)1500 A

cqRate

7500 S

TC

0 P

1N2O

2 500

Corr

DS

C020

[] Type [13] D

ynamic

Range

150050(Km

in)25 A

cqRate

7500 S

TC

0 P

1N2O

2 500

Corr

DS

C020

Project

Identity D

atetime

Laboratory O

perator S

ample

G57

6282016 91511 AM

G

lenn Research C

enter C

osta G

57 4000 mg

Reference

Material

Corrtem

pcal S

ensfile S

ample carTC

M

odetype of meas R

ef Al2O

30 mg

baseline for YS

Z 5 C_m

in up tp 1500 C 06-24-16bd8 TC

ALZE

RO

TMX

sensitivity from


air 01-06-16ed8 D

SC

Cp S

S

DS

C sam

ple with correction

Segm

ents C

rucible A

tmosphere

M range

3 DS

CTG

pan Pt

N2O

2 500mlm

in 5000 microV

Instrument N

ETZS

CH

DS

C 404F1 File C

NE

TZSC

HP

roteusdata5CostaS

amplesG

62dd8 Rem

ark Third DS

C run since O


200 400

600 800

1000 1200

1400 Tem

perature degC

-10

-08

-06

-04

-02

00

02

04

DS

C (m

Wm

g)

0 50

100

150

200

250

Flow (m

lmin)

Main

exo

DSC

traces of CM


to 1500 qC at 5 qC

min

ww

wnasagov

6


inistration

Advanced N

AS

A E

BC

Developm

ents

Improved tem


perature strength

Advanced com


bined therm



ards prime-reliant

Gen I (E

PM)

RampD

Award

Gen II (U

EET)


(U

EET) 2000-2005 R

ampD Aw

ard (2007)

Advanced EBC (FAP)

2005-2011 R

ampD Aw


ent

Advanced EBC

(FAP -ERA)

2007 -present

Advanced (FAP ERA)

Patent13923450 PC


Engine C

omponents

Com

bustor C

ombustor

(Vane) C

ombustor

Vane Vane Blade

-VaneBlade EB

Cs

-Equivalent APS com

bustor EBC

s

Airfoil components

Top Coat

BSAS (APS) R

E2 Si2 O

7 or R

E2 SiO

5 (APS)

-(HfY

bGdY

) 2 O3

-ZrO2 H

fO2 +R

E

silicates -ZrO

2 HfO

2 +BS

AS

(APS and EBPVD

)

RE-H

fO2 -Alum

ino silicate

(APS andor 100

EB-

PVD)

RE-H

fO2 -X

advanced top coat R

E-HfO

2 Silica (EB

-PVD etc vapor

deposition)

Advanced EBC

s

Interlayer --

--R

E-HfO

2 ZrO2 -

aluminosilicate

layered systems

Nanocom


--

EBC

M

ullite+ BSAS R

E2 Si2 O

7 and or BSAS+M

ullite

RE

silicates or R

E-Hf m

ullite R

E doped m

ullite-HfO

2 or R

E silicates

Multi-com

ponent R

E silicate systems

Multicom

ponent R


grown

Bond C

oat Si

Si O

xide+Si bond coat

HfO

2 -Si-X

doped mulliteSi

SiC nanotube

Optim

ized HfO


RE-Si+H

f systems

Thickness 10-15 m

il 10-15 m

il 15-20 m

il 10 m

il 5 m

il 1 -3 m

ils

Surface T U


3000degF2400CM

C

2700degF2400F CM

C

2700-3000degF

Bond Coat T

Limited to

2462degF Lim

it to 2462degF

Limit to 2642degF



2700degF

Challenges overcom

e by advancem

ents

ww

wnasagov

7


inistration

CM

AS

Related D

egradations in EBC

s

Cross-section

50 mm

minus C

MAS effects

bull S


BC


More detrim


BC

s bull

CM

AS



AS

increase EB



barrier bullC

MA

S interactions w


omechanical fatigue


Accelerated C

MC

failure when C

MA

S intact w

ith CM

Cs


Coating

surface

EB

C and degradations

CM

AS induced m


ww

nasagov 8


inistration

CM

AS R


BCs -C

ontinued minus

CM

AS effects on EBC


bull S


aO2 and A

l2 O3 silicate

Phase diagram

s showing yttrium


ith SiO

2 NaO

and Al2 O

3

ww

wnasagov

9


inistration

CM

AS R


BCs -C

ontinued minus

CM

AS effects on EBC




1500degC in the R

E2 O

3 -A

l2 O3 -S

iO2 based system

s bull

Sm

aller ionic size RE



2 Si2 O7 -A

l6 Si2 O13 -

SiO2 system


Y Murakam

i and H Yam

amoto J C

eram Soc Jpn 101 [10] 1101-1106 (1993)

ww

wnasagov

10


inistration

Rare Earth D

issolutions in CM

AS Melts

ZrO2 -30Y

2 O3 -15Sm

2 O3 -15Yb

2 O3

ZrO2 -30Y

2 O3 -15N

d2 O

3 -15Yb2 O

3 -03Sc2 O

3

ZrO2 -96Y

2 O3 -22G

d2 O

3 -21Yb2 O

3





AS

m

elt for ZrO2 -R

E2 O

3 oxide systems

ZrO2 -R

EO15 -H

f more endotherm

ic



eramics and C

omposites 2016

ww

wnasagov

11

Front CM

AS side


inistration

CM

AS Related D

egradations in EBC

coated CM

Cs ndash


minusC

MAS effects on EB

C-C

MC




MC


EBC

coated CV

I-MI C

MC

with N

dYb silicate R


MC

2450degF

Front heated CM

AS

side B

ack cooled side

Creep strain

Time h

Front CM

AS

side

200h

05

ww

wnasagov

12


inistration

EBC

CM

AS

Surface Initial N


eactions ndash

Ytterbium


AM

S

ndash M


pared to yttrium

Ytterbium


AS m

elts 50 Y


MA

S melts 5 h

h 1300degC

1500degC$

Yttrium


MA

S Y


MA

S melts 5 h

melts 50 h 1300degC

1500degC

A



ww

nasagov 13


inistration

Rare E

arth Apatite G

rain Grow

th ndash

Grain grow


es

Ytterbium

silicate system

50 hr 150 hr

200 hr

200 hr50 hr

150 hr

Yttrium

silicate system$

ww

wnasagov

14


inistration

Effect of C

MA

S R

eactions on Grain B

oundary Phases

ndash C

MA


l2 O3

content (17-22 mole

) bull

Eutectic region w

ith high Al2 O


elting point bull

Loss of SiO

2 due to volatility

200 hr 1500degC

NA

SA

modified

CM

AS

Grain


SiO

2 and high A

lumina

ww

wnasagov

15


inistration

Rare E


MA

S M

elts ndash

Non stoichiom


AS


ndash D


in apatite bull

Average AE

OR

E2 O


MA

S system

bull

Average AE

OR

E2 O


MA

S system

C


SiO2



RE

2 O3

AEO

Yttrium

Silicate EBC

Com


Ytterbium

Silicate EBC

ww

wnasagov

16


inistration

Advanced N

AS

A E

BC

Developm

ents

NA

SA advanced E

BC

systems em


2 -and ZrO2 -R

E2 O

3 -

EBC layer 2 region

EB

Cs

Mol

Mol

SiO

2 EB

C system

RE

2 Si2-x O

7-2x such as (YbG

dY) 2 S

i2-x O7-2x



(YbGdY) 2 S

i2-x O7-2x in

CM

AS

1300degC

(a)

(b)

ww

wnasagov

17


inistration E

xample of N

AS

A A

dvanced Environm

ental Barrier C

oating on S

iCSiC

CM

C System

s

Advanced EB

C coated vanes

HfO

2 -(YbG

dY)2 O

3

(YbG

dY)2 Si2-x O

7-2x

RESi(O

)+Hf B

ond Coat

Gd Y

b Y

O

Si

Yb

Gd Y

Si

Hf

A


2 -Multicom

ponent Rare E

arth silicate EB

Cs used for fundam



d-YbO+H


oated onto SiC

SiC

CM


B-P

VD


ww

wnasagov

18


inistration

CM

AS

Resistant Tests

ndash JE


s at 2700F

Plasma sprayed (G

dY)2 Si2 O

7 2450 cycles



ycles EB

-PVD

(YbG

dY)2 Si2 O


2450 4450

450

Hybrid H



Hybrid H


cycles 100h

2450 4450

2450 with

CM

AS 2450

ww

wnasagov

19


inistration

High S

tability and CM

AS

Resistance are E


igh M

elting Point C

oating and Multi-C

omponent C

ompositions A

rea A

Area B

ndash G

enerally improved C

MA

S

resistance of NAS

A R

ESi

System

at 1500degC 100 hr

ndash S


Rare earth elem



~9mol

)


MA

S melts

EDS E

ww

wnasagov

20


inistration

Advanced E

BC

-CM

C S

ystem D


igh Cycle and

Low Fatigue D

urability in High H




BC

with H



VI-M

I CM

C



igh Cycle and Low


ed at Stress


z at EB

C and 1 hr therm


Tested EB

C surface tem


perature 1482degC

(2700degF) with C

MA

S

-D


-D



C-C

MC

system


Test Condition Sum

mary

-EB

CC

VI-M


Pa) R


al LC

F$-

TEB

C-surface 1537degC

(2800degF)$-

Tbond coat 1482degC

(2700degF)$-

Tback C

MC

surface 1250degC

(2282degF)

ww

wnasagov

21


inistration

Advanced E

BC

-CM

C Fatigue Test w

ith CM

AS

and in Steam

Jet Tested 300 h D

urability in High H


-A

dvanced Hf-N

dYb silicate-N

dYbS

i bond coat EB

C coatings on 3D

architecture C

VI-P

IP S

iC-S

iC C

MC

(EB

-PV

D processing)



Surface view C

MA

S 35m

gcm2)

Back view

CM

AS

35mgcm

2)

ww

wnasagov


inistration

EBC

System

Designs ndash E

ffects of Com


Com

positions -

An alternating H

fO2 -and R


-PV


fO2 -layer


EB

-PV

D P

rocessed EB

Cs alternating H



CM

AS


ww

wnasagov


inistration

Sum

mary

bullC

MA

S degradation rem



iCSiC

CM

C com

ponent systems

bullC

MA

S leads to low



s with

accelerated EBC

and CM

C degradations

bullN

AS

A advanced E

BC com


e promise for C

MA

S





BC com

positions and EBC

-CM

AS


zirconium and rare



AS

resistance bull

Also standardize C

MA


MA



bullC


MA

S resistance w

hile maintaining


ww

wnasagov

24


inistration

Acknow

ledgements

bullThe w


ASA Fundam




r Michael H


ww

wnasagov

25


inistration

CM

AS

Reaction K

inetics in Bond C

oats ndash S


MA

S m

elts ndash R


ndash M


plemented for im

proved thermom

echanical ndash

CM



100hr

RE incorporations

CM

AS

resistance

ww

wnasagov

26




Bond Coats

-CM

AS

Reaction R


Selected E

BC

systems

ndashH

fO2 -R

E-S




ndashC

MA



fO2


659-AE9762

150

EBC

s

EBC

s

HfO

2 -Si (Si-rich)

Yb

2 Si 2 O 7

250658-EBC H

fO2-Rare Earth-A

lumino Silicate

660-Y2Si2O


b2Si2O7

Strength MPa


100681-H

fO2-Si

669-9762 with CM


693-HfO

2-Si with CM


5000

200 400

600 800

1000 1200

1400 1600

Temperature degC


Yb

2 Si2 O7 C

MA

S reacted tensile Y

b2 Si2 O

7 CM

AS reacted


surface w

ww

nasagov 27


inistration


MAS R


the Rare

Earth S

ilicon High M

elting Point C

oating Com

positions

ndashD

emonstrated C

MA

S resistance

of NAS

A R

E-Si S

ystem at

1500degC 100 hr

ndash S


Rare earth elem




ol)

CM

AS m

elts

Area A

Area B

ww

wnasagov

28


inistration

Advanced N

AS

A E

BC

Developm

ents

Improved tem


perature strength

Advanced com


bined therm



ards prime-reliant

Gen I (E

PM)

RampD

Award

Gen II (U

EET)


(U

EET) 2000-2005 R

ampD Aw

ard (2007)

Advanced EBC (FAP)

2005-2011 R

ampD Aw


ent

Advanced EBC

(FAP -ERA)

2007 -present

Advanced (FAP ERA)

Patent13923450 PC


Engine C

omponents

Com

bustor C

ombustor

(Vane) C

ombustor

Vane Vane Blade

-VaneBlade EB

Cs

-Equivalent APS com

bustor EBC

s

Airfoil components

Top Coat

BSAS (APS) R

E2 Si2 O

7 or R

E2 SiO

5 (APS)

-(HfY

bGdY

) 2 O3

-ZrO2 H

fO2 +R

E

silicates -ZrO

2 HfO

2 +BS

AS

(APS and EBPVD

)

RE-H

fO2 -Alum

ino silicate

(APS andor 100

EB-

PVD)

RE-H

fO2 -X

advanced top coat R

E-HfO

2 Silica (EB

-PVD etc vapor

deposition)

Advanced EBC

s

Interlayer --

--R

E-HfO

2 ZrO2 -

aluminosilicate

layered systems

Nanocom


--

EBC

M

ullite+ BSAS R

E2 Si2 O

7 and or BSAS+M

ullite

RE

silicates or R

E-Hf m

ullite R

E doped m

ullite-HfO

2 or R

E silicates

Multi-com

ponent R

E silicate systems

Multicom

ponent R


grown

Bond C

oat Si

Si O

xide+Si bond coat

HfO

2 -Si-X

doped mulliteSi

SiC nanotube

Optim

ized HfO


RE-Si+H

f systems

Thickness 10-15 m

il 10-15 m

il 15-20 m

il 10 m

il 5 m

il 1 -3 m

ils

Surface T U


3000degF2400CM

C

2700degF2400F CM

C

2700-3000degF

Bond Coat T

Limited to

2462degF Lim

it to 2462degF

Limit to 2642degF



2700degF

Challenges overcom

e by advancem

ents

ww

wnasagov

7


inistration

CM

AS

Related D

egradations in EBC

s

Cross-section

50 mm

minus C

MAS effects

bull S


BC


More detrim


BC

s bull

CM

AS



AS

increase EB



barrier bullC

MA

S interactions w


omechanical fatigue


Accelerated C

MC

failure when C

MA

S intact w

ith CM

Cs


Coating

surface

EB

C and degradations

CM

AS induced m


ww

nasagov 8


inistration

CM

AS R


BCs -C

ontinued minus

CM

AS effects on EBC


bull S


aO2 and A

l2 O3 silicate

Phase diagram

s showing yttrium


ith SiO

2 NaO

and Al2 O

3

ww

wnasagov

9


inistration

CM

AS R


BCs -C

ontinued minus

CM

AS effects on EBC




1500degC in the R

E2 O

3 -A

l2 O3 -S

iO2 based system

s bull

Sm

aller ionic size RE



2 Si2 O7 -A

l6 Si2 O13 -

SiO2 system


Y Murakam

i and H Yam

amoto J C

eram Soc Jpn 101 [10] 1101-1106 (1993)

ww

wnasagov

10


inistration

Rare Earth D

issolutions in CM

AS Melts

ZrO2 -30Y

2 O3 -15Sm

2 O3 -15Yb

2 O3

ZrO2 -30Y

2 O3 -15N

d2 O

3 -15Yb2 O

3 -03Sc2 O

3

ZrO2 -96Y

2 O3 -22G

d2 O

3 -21Yb2 O

3





AS

m

elt for ZrO2 -R

E2 O

3 oxide systems

ZrO2 -R

EO15 -H

f more endotherm

ic



eramics and C

omposites 2016

ww

wnasagov

11

Front CM

AS side


inistration

CM

AS Related D

egradations in EBC

coated CM

Cs ndash


minusC

MAS effects on EB

C-C

MC




MC


EBC

coated CV

I-MI C

MC

with N

dYb silicate R


MC

2450degF

Front heated CM

AS

side B

ack cooled side

Creep strain

Time h

Front CM

AS

side

200h

05

ww

wnasagov

12


inistration

EBC

CM

AS

Surface Initial N


eactions ndash

Ytterbium


AM

S

ndash M


pared to yttrium

Ytterbium


AS m

elts 50 Y


MA

S melts 5 h

h 1300degC

1500degC$

Yttrium


MA

S Y


MA

S melts 5 h

melts 50 h 1300degC

1500degC

A



ww

nasagov 13


inistration

Rare E

arth Apatite G

rain Grow

th ndash

Grain grow


es

Ytterbium

silicate system

50 hr 150 hr

200 hr

200 hr50 hr

150 hr

Yttrium

silicate system$

ww

wnasagov

14


inistration

Effect of C

MA

S R

eactions on Grain B

oundary Phases

ndash C

MA


l2 O3

content (17-22 mole

) bull

Eutectic region w

ith high Al2 O


elting point bull

Loss of SiO

2 due to volatility

200 hr 1500degC

NA

SA

modified

CM

AS

Grain


SiO

2 and high A

lumina

ww

wnasagov

15


inistration

Rare E


MA

S M

elts ndash

Non stoichiom


AS


ndash D


in apatite bull

Average AE

OR

E2 O


MA

S system

bull

Average AE

OR

E2 O


MA

S system

C


SiO2



RE

2 O3

AEO

Yttrium

Silicate EBC

Com


Ytterbium

Silicate EBC

ww

wnasagov

16


inistration

Advanced N

AS

A E

BC

Developm

ents

NA

SA advanced E

BC

systems em


2 -and ZrO2 -R

E2 O

3 -

EBC layer 2 region

EB

Cs

Mol

Mol

SiO

2 EB

C system

RE

2 Si2-x O

7-2x such as (YbG

dY) 2 S

i2-x O7-2x



(YbGdY) 2 S

i2-x O7-2x in

CM

AS

1300degC

(a)

(b)

ww

wnasagov

17


inistration E

xample of N

AS

A A

dvanced Environm

ental Barrier C

oating on S

iCSiC

CM

C System

s

Advanced EB

C coated vanes

HfO

2 -(YbG

dY)2 O

3

(YbG

dY)2 Si2-x O

7-2x

RESi(O

)+Hf B

ond Coat

Gd Y

b Y

O

Si

Yb

Gd Y

Si

Hf

A


2 -Multicom

ponent Rare E

arth silicate EB

Cs used for fundam



d-YbO+H


oated onto SiC

SiC

CM


B-P

VD


ww

wnasagov

18


inistration

CM

AS

Resistant Tests

ndash JE


s at 2700F

Plasma sprayed (G

dY)2 Si2 O

7 2450 cycles



ycles EB

-PVD

(YbG

dY)2 Si2 O


2450 4450

450

Hybrid H



Hybrid H


cycles 100h

2450 4450

2450 with

CM

AS 2450

ww

wnasagov

19


inistration

High S

tability and CM

AS

Resistance are E


igh M

elting Point C

oating and Multi-C

omponent C

ompositions A

rea A

Area B

ndash G

enerally improved C

MA

S

resistance of NAS

A R

ESi

System

at 1500degC 100 hr

ndash S


Rare earth elem



~9mol

)


MA

S melts

EDS E

ww

wnasagov

20


inistration

Advanced E

BC

-CM

C S

ystem D


igh Cycle and

Low Fatigue D

urability in High H




BC

with H



VI-M

I CM

C



igh Cycle and Low


ed at Stress


z at EB

C and 1 hr therm


Tested EB

C surface tem


perature 1482degC

(2700degF) with C

MA

S

-D


-D



C-C

MC

system


Test Condition Sum

mary

-EB

CC

VI-M


Pa) R


al LC

F$-

TEB

C-surface 1537degC

(2800degF)$-

Tbond coat 1482degC

(2700degF)$-

Tback C

MC

surface 1250degC

(2282degF)

ww

wnasagov

21


inistration

Advanced E

BC

-CM

C Fatigue Test w

ith CM

AS

and in Steam

Jet Tested 300 h D

urability in High H


-A

dvanced Hf-N

dYb silicate-N

dYbS

i bond coat EB

C coatings on 3D

architecture C

VI-P

IP S

iC-S

iC C

MC

(EB

-PV

D processing)



Surface view C

MA

S 35m

gcm2)

Back view

CM

AS

35mgcm

2)

ww

wnasagov


inistration

EBC

System

Designs ndash E

ffects of Com


Com

positions -

An alternating H

fO2 -and R


-PV


fO2 -layer


EB

-PV

D P

rocessed EB

Cs alternating H



CM

AS


ww

wnasagov


inistration

Sum

mary

bullC

MA

S degradation rem



iCSiC

CM

C com

ponent systems

bullC

MA

S leads to low



s with

accelerated EBC

and CM

C degradations

bullN

AS

A advanced E

BC com


e promise for C

MA

S





BC com

positions and EBC

-CM

AS


zirconium and rare



AS

resistance bull

Also standardize C

MA


MA



bullC


MA

S resistance w

hile maintaining


ww

wnasagov

24


inistration

Acknow

ledgements

bullThe w


ASA Fundam




r Michael H


ww

wnasagov

25


inistration

CM

AS

Reaction K

inetics in Bond C

oats ndash S


MA

S m

elts ndash R


ndash M


plemented for im

proved thermom

echanical ndash

CM



100hr

RE incorporations

CM

AS

resistance

ww

wnasagov

26




Bond Coats

-CM

AS

Reaction R


Selected E

BC

systems

ndashH

fO2 -R

E-S




ndashC

MA



fO2


659-AE9762

150

EBC

s

EBC

s

HfO

2 -Si (Si-rich)

Yb

2 Si 2 O 7

250658-EBC H

fO2-Rare Earth-A

lumino Silicate

660-Y2Si2O


b2Si2O7

Strength MPa


100681-H

fO2-Si

669-9762 with CM


693-HfO

2-Si with CM


5000

200 400

600 800

1000 1200

1400 1600

Temperature degC


Yb

2 Si2 O7 C

MA

S reacted tensile Y

b2 Si2 O

7 CM

AS reacted


surface w

ww

nasagov 27


inistration


MAS R


the Rare

Earth S

ilicon High M

elting Point C

oating Com

positions

ndashD

emonstrated C

MA

S resistance

of NAS

A R

E-Si S

ystem at

1500degC 100 hr

ndash S


Rare earth elem




ol)

CM

AS m

elts

Area A

Area B

ww

wnasagov

28


inistration

CM

AS

Related D

egradations in EBC

s

Cross-section

50 mm

minus C

MAS effects

bull S


BC


More detrim


BC

s bull

CM

AS



AS

increase EB



barrier bullC

MA

S interactions w


omechanical fatigue


Accelerated C

MC

failure when C

MA

S intact w

ith CM

Cs


Coating

surface

EB

C and degradations

CM

AS induced m


ww

nasagov 8


inistration

CM

AS R


BCs -C

ontinued minus

CM

AS effects on EBC


bull S


aO2 and A

l2 O3 silicate

Phase diagram

s showing yttrium


ith SiO

2 NaO

and Al2 O

3

ww

wnasagov

9


inistration

CM

AS R


BCs -C

ontinued minus

CM

AS effects on EBC




1500degC in the R

E2 O

3 -A

l2 O3 -S

iO2 based system

s bull

Sm

aller ionic size RE



2 Si2 O7 -A

l6 Si2 O13 -

SiO2 system


Y Murakam

i and H Yam

amoto J C

eram Soc Jpn 101 [10] 1101-1106 (1993)

ww

wnasagov

10


inistration

Rare Earth D

issolutions in CM

AS Melts

ZrO2 -30Y

2 O3 -15Sm

2 O3 -15Yb

2 O3

ZrO2 -30Y

2 O3 -15N

d2 O

3 -15Yb2 O

3 -03Sc2 O

3

ZrO2 -96Y

2 O3 -22G

d2 O

3 -21Yb2 O

3





AS

m

elt for ZrO2 -R

E2 O

3 oxide systems

ZrO2 -R

EO15 -H

f more endotherm

ic



eramics and C

omposites 2016

ww

wnasagov

11

Front CM

AS side


inistration

CM

AS Related D

egradations in EBC

coated CM

Cs ndash


minusC

MAS effects on EB

C-C

MC




MC


EBC

coated CV

I-MI C

MC

with N

dYb silicate R


MC

2450degF

Front heated CM

AS

side B

ack cooled side

Creep strain

Time h

Front CM

AS

side

200h

05

ww

wnasagov

12


inistration

EBC

CM

AS

Surface Initial N


eactions ndash

Ytterbium


AM

S

ndash M


pared to yttrium

Ytterbium


AS m

elts 50 Y


MA

S melts 5 h

h 1300degC

1500degC$

Yttrium


MA

S Y


MA

S melts 5 h

melts 50 h 1300degC

1500degC

A



ww

nasagov 13


inistration

Rare E

arth Apatite G

rain Grow

th ndash

Grain grow


es

Ytterbium

silicate system

50 hr 150 hr

200 hr

200 hr50 hr

150 hr

Yttrium

silicate system$

ww

wnasagov

14


inistration

Effect of C

MA

S R

eactions on Grain B

oundary Phases

ndash C

MA


l2 O3

content (17-22 mole

) bull

Eutectic region w

ith high Al2 O


elting point bull

Loss of SiO

2 due to volatility

200 hr 1500degC

NA

SA

modified

CM

AS

Grain


SiO

2 and high A

lumina

ww

wnasagov

15


inistration

Rare E


MA

S M

elts ndash

Non stoichiom


AS


ndash D


in apatite bull

Average AE

OR

E2 O


MA

S system

bull

Average AE

OR

E2 O


MA

S system

C


SiO2



RE

2 O3

AEO

Yttrium

Silicate EBC

Com


Ytterbium

Silicate EBC

ww

wnasagov

16


inistration

Advanced N

AS

A E

BC

Developm

ents

NA

SA advanced E

BC

systems em


2 -and ZrO2 -R

E2 O

3 -

EBC layer 2 region

EB

Cs

Mol

Mol

SiO

2 EB

C system

RE

2 Si2-x O

7-2x such as (YbG

dY) 2 S

i2-x O7-2x



(YbGdY) 2 S

i2-x O7-2x in

CM

AS

1300degC

(a)

(b)

ww

wnasagov

17


inistration E

xample of N

AS

A A

dvanced Environm

ental Barrier C

oating on S

iCSiC

CM

C System

s

Advanced EB

C coated vanes

HfO

2 -(YbG

dY)2 O

3

(YbG

dY)2 Si2-x O

7-2x

RESi(O

)+Hf B

ond Coat

Gd Y

b Y

O

Si

Yb

Gd Y

Si

Hf

A


2 -Multicom

ponent Rare E

arth silicate EB

Cs used for fundam



d-YbO+H


oated onto SiC

SiC

CM


B-P

VD


ww

wnasagov

18


inistration

CM

AS

Resistant Tests

ndash JE


s at 2700F

Plasma sprayed (G

dY)2 Si2 O

7 2450 cycles



ycles EB

-PVD

(YbG

dY)2 Si2 O


2450 4450

450

Hybrid H



Hybrid H


cycles 100h

2450 4450

2450 with

CM

AS 2450

ww

wnasagov

19


inistration

High S

tability and CM

AS

Resistance are E


igh M

elting Point C

oating and Multi-C

omponent C

ompositions A

rea A

Area B

ndash G

enerally improved C

MA

S

resistance of NAS

A R

ESi

System

at 1500degC 100 hr

ndash S


Rare earth elem



~9mol

)


MA

S melts

EDS E

ww

wnasagov

20


inistration

Advanced E

BC

-CM

C S

ystem D


igh Cycle and

Low Fatigue D

urability in High H




BC

with H



VI-M

I CM

C



igh Cycle and Low


ed at Stress


z at EB

C and 1 hr therm


Tested EB

C surface tem


perature 1482degC

(2700degF) with C

MA

S

-D


-D



C-C

MC

system


Test Condition Sum

mary

-EB

CC

VI-M


Pa) R


al LC

F$-

TEB

C-surface 1537degC

(2800degF)$-

Tbond coat 1482degC

(2700degF)$-

Tback C

MC

surface 1250degC

(2282degF)

ww

wnasagov

21


inistration

Advanced E

BC

-CM

C Fatigue Test w

ith CM

AS

and in Steam

Jet Tested 300 h D

urability in High H


-A

dvanced Hf-N

dYb silicate-N

dYbS

i bond coat EB

C coatings on 3D

architecture C

VI-P

IP S

iC-S

iC C

MC

(EB

-PV

D processing)



Surface view C

MA

S 35m

gcm2)

Back view

CM

AS

35mgcm

2)

ww

wnasagov


inistration

EBC

System

Designs ndash E

ffects of Com


Com

positions -

An alternating H

fO2 -and R


-PV


fO2 -layer


EB

-PV

D P

rocessed EB

Cs alternating H



CM

AS


ww

wnasagov


inistration

Sum

mary

bullC

MA

S degradation rem



iCSiC

CM

C com

ponent systems

bullC

MA

S leads to low



s with

accelerated EBC

and CM

C degradations

bullN

AS

A advanced E

BC com


e promise for C

MA

S





BC com

positions and EBC

-CM

AS


zirconium and rare



AS

resistance bull

Also standardize C

MA


MA



bullC


MA

S resistance w

hile maintaining


ww

wnasagov

24


inistration

Acknow

ledgements

bullThe w


ASA Fundam




r Michael H


ww

wnasagov

25


inistration

CM

AS

Reaction K

inetics in Bond C

oats ndash S


MA

S m

elts ndash R


ndash M


plemented for im

proved thermom

echanical ndash

CM



100hr

RE incorporations

CM

AS

resistance

ww

wnasagov

26




Bond Coats

-CM

AS

Reaction R


Selected E

BC

systems

ndashH

fO2 -R

E-S




ndashC

MA



fO2


659-AE9762

150

EBC

s

EBC

s

HfO

2 -Si (Si-rich)

Yb

2 Si 2 O 7

250658-EBC H

fO2-Rare Earth-A

lumino Silicate

660-Y2Si2O


b2Si2O7

Strength MPa


100681-H

fO2-Si

669-9762 with CM


693-HfO

2-Si with CM


5000

200 400

600 800

1000 1200

1400 1600

Temperature degC


Yb

2 Si2 O7 C

MA

S reacted tensile Y

b2 Si2 O

7 CM

AS reacted


surface w

ww

nasagov 27


inistration


MAS R


the Rare

Earth S

ilicon High M

elting Point C

oating Com

positions

ndashD

emonstrated C

MA

S resistance

of NAS

A R

E-Si S

ystem at

1500degC 100 hr

ndash S


Rare earth elem




ol)

CM

AS m

elts

Area A

Area B

ww

wnasagov

28


inistration

CM

AS R


BCs -C

ontinued minus

CM

AS effects on EBC


bull S


aO2 and A

l2 O3 silicate

Phase diagram

s showing yttrium


ith SiO

2 NaO

and Al2 O

3

ww

wnasagov

9


inistration

CM

AS R


BCs -C

ontinued minus

CM

AS effects on EBC




1500degC in the R

E2 O

3 -A

l2 O3 -S

iO2 based system

s bull

Sm

aller ionic size RE



2 Si2 O7 -A

l6 Si2 O13 -

SiO2 system


Y Murakam

i and H Yam

amoto J C

eram Soc Jpn 101 [10] 1101-1106 (1993)

ww

wnasagov

10


inistration

Rare Earth D

issolutions in CM

AS Melts

ZrO2 -30Y

2 O3 -15Sm

2 O3 -15Yb

2 O3

ZrO2 -30Y

2 O3 -15N

d2 O

3 -15Yb2 O

3 -03Sc2 O

3

ZrO2 -96Y

2 O3 -22G

d2 O

3 -21Yb2 O

3





AS

m

elt for ZrO2 -R

E2 O

3 oxide systems

ZrO2 -R

EO15 -H

f more endotherm

ic



eramics and C

omposites 2016

ww

wnasagov

11

Front CM

AS side


inistration

CM

AS Related D

egradations in EBC

coated CM

Cs ndash


minusC

MAS effects on EB

C-C

MC




MC


EBC

coated CV

I-MI C

MC

with N

dYb silicate R


MC

2450degF

Front heated CM

AS

side B

ack cooled side

Creep strain

Time h

Front CM

AS

side

200h

05

ww

wnasagov

12


inistration

EBC

CM

AS

Surface Initial N


eactions ndash

Ytterbium


AM

S

ndash M


pared to yttrium

Ytterbium


AS m

elts 50 Y


MA

S melts 5 h

h 1300degC

1500degC$

Yttrium


MA

S Y


MA

S melts 5 h

melts 50 h 1300degC

1500degC

A



ww

nasagov 13


inistration

Rare E

arth Apatite G

rain Grow

th ndash

Grain grow


es

Ytterbium

silicate system

50 hr 150 hr

200 hr

200 hr50 hr

150 hr

Yttrium

silicate system$

ww

wnasagov

14


inistration

Effect of C

MA

S R

eactions on Grain B

oundary Phases

ndash C

MA


l2 O3

content (17-22 mole

) bull

Eutectic region w

ith high Al2 O


elting point bull

Loss of SiO

2 due to volatility

200 hr 1500degC

NA

SA

modified

CM

AS

Grain


SiO

2 and high A

lumina

ww

wnasagov

15


inistration

Rare E


MA

S M

elts ndash

Non stoichiom


AS


ndash D


in apatite bull

Average AE

OR

E2 O


MA

S system

bull

Average AE

OR

E2 O


MA

S system

C


SiO2



RE

2 O3

AEO

Yttrium

Silicate EBC

Com


Ytterbium

Silicate EBC

ww

wnasagov

16


inistration

Advanced N

AS

A E

BC

Developm

ents

NA

SA advanced E

BC

systems em


2 -and ZrO2 -R

E2 O

3 -

EBC layer 2 region

EB

Cs

Mol

Mol

SiO

2 EB

C system

RE

2 Si2-x O

7-2x such as (YbG

dY) 2 S

i2-x O7-2x



(YbGdY) 2 S

i2-x O7-2x in

CM

AS

1300degC

(a)

(b)

ww

wnasagov

17


inistration E

xample of N

AS

A A

dvanced Environm

ental Barrier C

oating on S

iCSiC

CM

C System

s

Advanced EB

C coated vanes

HfO

2 -(YbG

dY)2 O

3

(YbG

dY)2 Si2-x O

7-2x

RESi(O

)+Hf B

ond Coat

Gd Y

b Y

O

Si

Yb

Gd Y

Si

Hf

A


2 -Multicom

ponent Rare E

arth silicate EB

Cs used for fundam



d-YbO+H


oated onto SiC

SiC

CM


B-P

VD


ww

wnasagov

18


inistration

CM

AS

Resistant Tests

ndash JE


s at 2700F

Plasma sprayed (G

dY)2 Si2 O

7 2450 cycles



ycles EB

-PVD

(YbG

dY)2 Si2 O


2450 4450

450

Hybrid H



Hybrid H


cycles 100h

2450 4450

2450 with

CM

AS 2450

ww

wnasagov

19


inistration

High S

tability and CM

AS

Resistance are E


igh M

elting Point C

oating and Multi-C

omponent C

ompositions A

rea A

Area B

ndash G

enerally improved C

MA

S

resistance of NAS

A R

ESi

System

at 1500degC 100 hr

ndash S


Rare earth elem



~9mol

)


MA

S melts

EDS E

ww

wnasagov

20


inistration

Advanced E

BC

-CM

C S

ystem D


igh Cycle and

Low Fatigue D

urability in High H




BC

with H



VI-M

I CM

C



igh Cycle and Low


ed at Stress


z at EB

C and 1 hr therm


Tested EB

C surface tem


perature 1482degC

(2700degF) with C

MA

S

-D


-D



C-C

MC

system


Test Condition Sum

mary

-EB

CC

VI-M


Pa) R


al LC

F$-

TEB

C-surface 1537degC

(2800degF)$-

Tbond coat 1482degC

(2700degF)$-

Tback C

MC

surface 1250degC

(2282degF)

ww

wnasagov

21


inistration

Advanced E

BC

-CM

C Fatigue Test w

ith CM

AS

and in Steam

Jet Tested 300 h D

urability in High H


-A

dvanced Hf-N

dYb silicate-N

dYbS

i bond coat EB

C coatings on 3D

architecture C

VI-P

IP S

iC-S

iC C

MC

(EB

-PV

D processing)



Surface view C

MA

S 35m

gcm2)

Back view

CM

AS

35mgcm

2)

ww

wnasagov


inistration

EBC

System

Designs ndash E

ffects of Com


Com

positions -

An alternating H

fO2 -and R


-PV


fO2 -layer


EB

-PV

D P

rocessed EB

Cs alternating H



CM

AS


ww

wnasagov


inistration

Sum

mary

bullC

MA

S degradation rem



iCSiC

CM

C com

ponent systems

bullC

MA

S leads to low



s with

accelerated EBC

and CM

C degradations

bullN

AS

A advanced E

BC com


e promise for C

MA

S





BC com

positions and EBC

-CM

AS


zirconium and rare



AS

resistance bull

Also standardize C

MA


MA



bullC


MA

S resistance w

hile maintaining


ww

wnasagov

24


inistration

Acknow

ledgements

bullThe w


ASA Fundam




r Michael H


ww

wnasagov

25


inistration

CM

AS

Reaction K

inetics in Bond C

oats ndash S


MA

S m

elts ndash R


ndash M


plemented for im

proved thermom

echanical ndash

CM



100hr

RE incorporations

CM

AS

resistance

ww

wnasagov

26




Bond Coats

-CM

AS

Reaction R


Selected E

BC

systems

ndashH

fO2 -R

E-S




ndashC

MA



fO2


659-AE9762

150

EBC

s

EBC

s

HfO

2 -Si (Si-rich)

Yb

2 Si 2 O 7

250658-EBC H

fO2-Rare Earth-A

lumino Silicate

660-Y2Si2O


b2Si2O7

Strength MPa


100681-H

fO2-Si

669-9762 with CM


693-HfO

2-Si with CM


5000

200 400

600 800

1000 1200

1400 1600

Temperature degC


Yb

2 Si2 O7 C

MA

S reacted tensile Y

b2 Si2 O

7 CM

AS reacted


surface w

ww

nasagov 27


inistration


MAS R


the Rare

Earth S

ilicon High M

elting Point C

oating Com

positions

ndashD

emonstrated C

MA

S resistance

of NAS

A R

E-Si S

ystem at

1500degC 100 hr

ndash S


Rare earth elem




ol)

CM

AS m

elts

Area A

Area B

ww

wnasagov

28


inistration

CM

AS R


BCs -C

ontinued minus

CM

AS effects on EBC




1500degC in the R

E2 O

3 -A

l2 O3 -S

iO2 based system

s bull

Sm

aller ionic size RE



2 Si2 O7 -A

l6 Si2 O13 -

SiO2 system


Y Murakam

i and H Yam

amoto J C

eram Soc Jpn 101 [10] 1101-1106 (1993)

ww

wnasagov

10


inistration

Rare Earth D

issolutions in CM

AS Melts

ZrO2 -30Y

2 O3 -15Sm

2 O3 -15Yb

2 O3

ZrO2 -30Y

2 O3 -15N

d2 O

3 -15Yb2 O

3 -03Sc2 O

3

ZrO2 -96Y

2 O3 -22G

d2 O

3 -21Yb2 O

3





AS

m

elt for ZrO2 -R

E2 O

3 oxide systems

ZrO2 -R

EO15 -H

f more endotherm

ic



eramics and C

omposites 2016

ww

wnasagov

11

Front CM

AS side


inistration

CM

AS Related D

egradations in EBC

coated CM

Cs ndash


minusC

MAS effects on EB

C-C

MC




MC


EBC

coated CV

I-MI C

MC

with N

dYb silicate R


MC

2450degF

Front heated CM

AS

side B

ack cooled side

Creep strain

Time h

Front CM

AS

side

200h

05

ww

wnasagov

12


inistration

EBC

CM

AS

Surface Initial N


eactions ndash

Ytterbium


AM

S

ndash M


pared to yttrium

Ytterbium


AS m

elts 50 Y


MA

S melts 5 h

h 1300degC

1500degC$

Yttrium


MA

S Y


MA

S melts 5 h

melts 50 h 1300degC

1500degC

A



ww

nasagov 13


inistration

Rare E

arth Apatite G

rain Grow

th ndash

Grain grow


es

Ytterbium

silicate system

50 hr 150 hr

200 hr

200 hr50 hr

150 hr

Yttrium

silicate system$

ww

wnasagov

14


inistration

Effect of C

MA

S R

eactions on Grain B

oundary Phases

ndash C

MA


l2 O3

content (17-22 mole

) bull

Eutectic region w

ith high Al2 O


elting point bull

Loss of SiO

2 due to volatility

200 hr 1500degC

NA

SA

modified

CM

AS

Grain


SiO

2 and high A

lumina

ww

wnasagov

15


inistration

Rare E


MA

S M

elts ndash

Non stoichiom


AS


ndash D


in apatite bull

Average AE

OR

E2 O


MA

S system

bull

Average AE

OR

E2 O


MA

S system

C


SiO2



RE

2 O3

AEO

Yttrium

Silicate EBC

Com


Ytterbium

Silicate EBC

ww

wnasagov

16


inistration

Advanced N

AS

A E

BC

Developm

ents

NA

SA advanced E

BC

systems em


2 -and ZrO2 -R

E2 O

3 -

EBC layer 2 region

EB

Cs

Mol

Mol

SiO

2 EB

C system

RE

2 Si2-x O

7-2x such as (YbG

dY) 2 S

i2-x O7-2x



(YbGdY) 2 S

i2-x O7-2x in

CM

AS

1300degC

(a)

(b)

ww

wnasagov

17


inistration E

xample of N

AS

A A

dvanced Environm

ental Barrier C

oating on S

iCSiC

CM

C System

s

Advanced EB

C coated vanes

HfO

2 -(YbG

dY)2 O

3

(YbG

dY)2 Si2-x O

7-2x

RESi(O

)+Hf B

ond Coat

Gd Y

b Y

O

Si

Yb

Gd Y

Si

Hf

A


2 -Multicom

ponent Rare E

arth silicate EB

Cs used for fundam



d-YbO+H


oated onto SiC

SiC

CM


B-P

VD


ww

wnasagov

18


inistration

CM

AS

Resistant Tests

ndash JE


s at 2700F

Plasma sprayed (G

dY)2 Si2 O

7 2450 cycles



ycles EB

-PVD

(YbG

dY)2 Si2 O


2450 4450

450

Hybrid H



Hybrid H


cycles 100h

2450 4450

2450 with

CM

AS 2450

ww

wnasagov

19


inistration

High S

tability and CM

AS

Resistance are E


igh M

elting Point C

oating and Multi-C

omponent C

ompositions A

rea A

Area B

ndash G

enerally improved C

MA

S

resistance of NAS

A R

ESi

System

at 1500degC 100 hr

ndash S


Rare earth elem



~9mol

)


MA

S melts

EDS E

ww

wnasagov

20


inistration

Advanced E

BC

-CM

C S

ystem D


igh Cycle and

Low Fatigue D

urability in High H




BC

with H



VI-M

I CM

C



igh Cycle and Low


ed at Stress


z at EB

C and 1 hr therm


Tested EB

C surface tem


perature 1482degC

(2700degF) with C

MA

S

-D


-D



C-C

MC

system


Test Condition Sum

mary

-EB

CC

VI-M


Pa) R


al LC

F$-

TEB

C-surface 1537degC

(2800degF)$-

Tbond coat 1482degC

(2700degF)$-

Tback C

MC

surface 1250degC

(2282degF)

ww

wnasagov

21


inistration

Advanced E

BC

-CM

C Fatigue Test w

ith CM

AS

and in Steam

Jet Tested 300 h D

urability in High H


-A

dvanced Hf-N

dYb silicate-N

dYbS

i bond coat EB

C coatings on 3D

architecture C

VI-P

IP S

iC-S

iC C

MC

(EB

-PV

D processing)



Surface view C

MA

S 35m

gcm2)

Back view

CM

AS

35mgcm

2)

ww

wnasagov


inistration

EBC

System

Designs ndash E

ffects of Com


Com

positions -

An alternating H

fO2 -and R


-PV


fO2 -layer


EB

-PV

D P

rocessed EB

Cs alternating H



CM

AS


ww

wnasagov


inistration

Sum

mary

bullC

MA

S degradation rem



iCSiC

CM

C com

ponent systems

bullC

MA

S leads to low



s with

accelerated EBC

and CM

C degradations

bullN

AS

A advanced E

BC com


e promise for C

MA

S





BC com

positions and EBC

-CM

AS


zirconium and rare



AS

resistance bull

Also standardize C

MA


MA



bullC


MA

S resistance w

hile maintaining


ww

wnasagov

24


inistration

Acknow

ledgements

bullThe w


ASA Fundam




r Michael H


ww

wnasagov

25


inistration

CM

AS

Reaction K

inetics in Bond C

oats ndash S


MA

S m

elts ndash R


ndash M


plemented for im

proved thermom

echanical ndash

CM



100hr

RE incorporations

CM

AS

resistance

ww

wnasagov

26




Bond Coats

-CM

AS

Reaction R


Selected E

BC

systems

ndashH

fO2 -R

E-S




ndashC

MA



fO2


659-AE9762

150

EBC

s

EBC

s

HfO

2 -Si (Si-rich)

Yb

2 Si 2 O 7

250658-EBC H

fO2-Rare Earth-A

lumino Silicate

660-Y2Si2O


b2Si2O7

Strength MPa


100681-H

fO2-Si

669-9762 with CM


693-HfO

2-Si with CM


5000

200 400

600 800

1000 1200

1400 1600

Temperature degC


Yb

2 Si2 O7 C

MA

S reacted tensile Y

b2 Si2 O

7 CM

AS reacted


surface w

ww

nasagov 27


inistration


MAS R


the Rare

Earth S

ilicon High M

elting Point C

oating Com

positions

ndashD

emonstrated C

MA

S resistance

of NAS

A R

E-Si S

ystem at

1500degC 100 hr

ndash S


Rare earth elem




ol)

CM

AS m

elts

Area A

Area B

ww

wnasagov

28


inistration

Rare Earth D

issolutions in CM

AS Melts

ZrO2 -30Y

2 O3 -15Sm

2 O3 -15Yb

2 O3

ZrO2 -30Y

2 O3 -15N

d2 O

3 -15Yb2 O

3 -03Sc2 O

3

ZrO2 -96Y

2 O3 -22G

d2 O

3 -21Yb2 O

3





AS

m

elt for ZrO2 -R

E2 O

3 oxide systems

ZrO2 -R

EO15 -H

f more endotherm

ic



eramics and C

omposites 2016

ww

wnasagov

11

Front CM

AS side


inistration

CM

AS Related D

egradations in EBC

coated CM

Cs ndash


minusC

MAS effects on EB

C-C

MC




MC


EBC

coated CV

I-MI C

MC

with N

dYb silicate R


MC

2450degF

Front heated CM

AS

side B

ack cooled side

Creep strain

Time h

Front CM

AS

side

200h

05

ww

wnasagov

12


inistration

EBC

CM

AS

Surface Initial N


eactions ndash

Ytterbium


AM

S

ndash M


pared to yttrium

Ytterbium


AS m

elts 50 Y


MA

S melts 5 h

h 1300degC

1500degC$

Yttrium


MA

S Y


MA

S melts 5 h

melts 50 h 1300degC

1500degC

A



ww

nasagov 13


inistration

Rare E

arth Apatite G

rain Grow

th ndash

Grain grow


es

Ytterbium

silicate system

50 hr 150 hr

200 hr

200 hr50 hr

150 hr

Yttrium

silicate system$

ww

wnasagov

14


inistration

Effect of C

MA

S R

eactions on Grain B

oundary Phases

ndash C

MA


l2 O3

content (17-22 mole

) bull

Eutectic region w

ith high Al2 O


elting point bull

Loss of SiO

2 due to volatility

200 hr 1500degC

NA

SA

modified

CM

AS

Grain


SiO

2 and high A

lumina

ww

wnasagov

15


inistration

Rare E


MA

S M

elts ndash

Non stoichiom


AS


ndash D


in apatite bull

Average AE

OR

E2 O


MA

S system

bull

Average AE

OR

E2 O


MA

S system

C


SiO2



RE

2 O3

AEO

Yttrium

Silicate EBC

Com


Ytterbium

Silicate EBC

ww

wnasagov

16


inistration

Advanced N

AS

A E

BC

Developm

ents

NA

SA advanced E

BC

systems em


2 -and ZrO2 -R

E2 O

3 -

EBC layer 2 region

EB

Cs

Mol

Mol

SiO

2 EB

C system

RE

2 Si2-x O

7-2x such as (YbG

dY) 2 S

i2-x O7-2x



(YbGdY) 2 S

i2-x O7-2x in

CM

AS

1300degC

(a)

(b)

ww

wnasagov

17


inistration E

xample of N

AS

A A

dvanced Environm

ental Barrier C

oating on S

iCSiC

CM

C System

s

Advanced EB

C coated vanes

HfO

2 -(YbG

dY)2 O

3

(YbG

dY)2 Si2-x O

7-2x

RESi(O

)+Hf B

ond Coat

Gd Y

b Y

O

Si

Yb

Gd Y

Si

Hf

A


2 -Multicom

ponent Rare E

arth silicate EB

Cs used for fundam



d-YbO+H


oated onto SiC

SiC

CM


B-P

VD


ww

wnasagov

18


inistration

CM

AS

Resistant Tests

ndash JE


s at 2700F

Plasma sprayed (G

dY)2 Si2 O

7 2450 cycles



ycles EB

-PVD

(YbG

dY)2 Si2 O


2450 4450

450

Hybrid H



Hybrid H


cycles 100h

2450 4450

2450 with

CM

AS 2450

ww

wnasagov

19


inistration

High S

tability and CM

AS

Resistance are E


igh M

elting Point C

oating and Multi-C

omponent C

ompositions A

rea A

Area B

ndash G

enerally improved C

MA

S

resistance of NAS

A R

ESi

System

at 1500degC 100 hr

ndash S


Rare earth elem



~9mol

)


MA

S melts

EDS E

ww

wnasagov

20


inistration

Advanced E

BC

-CM

C S

ystem D


igh Cycle and

Low Fatigue D

urability in High H




BC

with H



VI-M

I CM

C



igh Cycle and Low


ed at Stress


z at EB

C and 1 hr therm


Tested EB

C surface tem


perature 1482degC

(2700degF) with C

MA

S

-D


-D



C-C

MC

system


Test Condition Sum

mary

-EB

CC

VI-M


Pa) R


al LC

F$-

TEB

C-surface 1537degC

(2800degF)$-

Tbond coat 1482degC

(2700degF)$-

Tback C

MC

surface 1250degC

(2282degF)

ww

wnasagov

21


inistration

Advanced E

BC

-CM

C Fatigue Test w

ith CM

AS

and in Steam

Jet Tested 300 h D

urability in High H


-A

dvanced Hf-N

dYb silicate-N

dYbS

i bond coat EB

C coatings on 3D

architecture C

VI-P

IP S

iC-S

iC C

MC

(EB

-PV

D processing)



Surface view C

MA

S 35m

gcm2)

Back view

CM

AS

35mgcm

2)

ww

wnasagov


inistration

EBC

System

Designs ndash E

ffects of Com


Com

positions -

An alternating H

fO2 -and R


-PV


fO2 -layer


EB

-PV

D P

rocessed EB

Cs alternating H



CM

AS


ww

wnasagov


inistration

Sum

mary

bullC

MA

S degradation rem



iCSiC

CM

C com

ponent systems

bullC

MA

S leads to low



s with

accelerated EBC

and CM

C degradations

bullN

AS

A advanced E

BC com


e promise for C

MA

S





BC com

positions and EBC

-CM

AS


zirconium and rare



AS

resistance bull

Also standardize C

MA


MA



bullC


MA

S resistance w

hile maintaining


ww

wnasagov

24


inistration

Acknow

ledgements

bullThe w


ASA Fundam




r Michael H


ww

wnasagov

25


inistration

CM

AS

Reaction K

inetics in Bond C

oats ndash S


MA

S m

elts ndash R


ndash M


plemented for im

proved thermom

echanical ndash

CM



100hr

RE incorporations

CM

AS

resistance

ww

wnasagov

26




Bond Coats

-CM

AS

Reaction R


Selected E

BC

systems

ndashH

fO2 -R

E-S




ndashC

MA



fO2


659-AE9762

150

EBC

s

EBC

s

HfO

2 -Si (Si-rich)

Yb

2 Si 2 O 7

250658-EBC H

fO2-Rare Earth-A

lumino Silicate

660-Y2Si2O


b2Si2O7

Strength MPa


100681-H

fO2-Si

669-9762 with CM


693-HfO

2-Si with CM


5000

200 400

600 800

1000 1200

1400 1600

Temperature degC


Yb

2 Si2 O7 C

MA

S reacted tensile Y

b2 Si2 O

7 CM

AS reacted


surface w

ww

nasagov 27


inistration


MAS R


the Rare

Earth S

ilicon High M

elting Point C

oating Com

positions

ndashD

emonstrated C

MA

S resistance

of NAS

A R

E-Si S

ystem at

1500degC 100 hr

ndash S


Rare earth elem




ol)

CM

AS m

elts

Area A

Area B

ww

wnasagov

28

Front CM

AS side


inistration

CM

AS Related D

egradations in EBC

coated CM

Cs ndash


minusC

MAS effects on EB

C-C

MC




MC


EBC

coated CV

I-MI C

MC

with N

dYb silicate R


MC

2450degF

Front heated CM

AS

side B

ack cooled side

Creep strain

Time h

Front CM

AS

side

200h

05

ww

wnasagov

12


inistration

EBC

CM

AS

Surface Initial N


eactions ndash

Ytterbium


AM

S

ndash M


pared to yttrium

Ytterbium


AS m

elts 50 Y


MA

S melts 5 h

h 1300degC

1500degC$

Yttrium


MA

S Y


MA

S melts 5 h

melts 50 h 1300degC

1500degC

A



ww

nasagov 13


inistration

Rare E

arth Apatite G

rain Grow

th ndash

Grain grow


es

Ytterbium

silicate system

50 hr 150 hr

200 hr

200 hr50 hr

150 hr

Yttrium

silicate system$

ww

wnasagov

14


inistration

Effect of C

MA

S R

eactions on Grain B

oundary Phases

ndash C

MA


l2 O3

content (17-22 mole

) bull

Eutectic region w

ith high Al2 O


elting point bull

Loss of SiO

2 due to volatility

200 hr 1500degC

NA

SA

modified

CM

AS

Grain


SiO

2 and high A

lumina

ww

wnasagov

15


inistration

Rare E


MA

S M

elts ndash

Non stoichiom


AS


ndash D


in apatite bull

Average AE

OR

E2 O


MA

S system

bull

Average AE

OR

E2 O


MA

S system

C


SiO2



RE

2 O3

AEO

Yttrium

Silicate EBC

Com


Ytterbium

Silicate EBC

ww

wnasagov

16


inistration

Advanced N

AS

A E

BC

Developm

ents

NA

SA advanced E

BC

systems em


2 -and ZrO2 -R

E2 O

3 -

EBC layer 2 region

EB

Cs

Mol

Mol

SiO

2 EB

C system

RE

2 Si2-x O

7-2x such as (YbG

dY) 2 S

i2-x O7-2x



(YbGdY) 2 S

i2-x O7-2x in

CM

AS

1300degC

(a)

(b)

ww

wnasagov

17


inistration E

xample of N

AS

A A

dvanced Environm

ental Barrier C

oating on S

iCSiC

CM

C System

s

Advanced EB

C coated vanes

HfO

2 -(YbG

dY)2 O

3

(YbG

dY)2 Si2-x O

7-2x

RESi(O

)+Hf B

ond Coat

Gd Y

b Y

O

Si

Yb

Gd Y

Si

Hf

A


2 -Multicom

ponent Rare E

arth silicate EB

Cs used for fundam



d-YbO+H


oated onto SiC

SiC

CM


B-P

VD


ww

wnasagov

18


inistration

CM

AS

Resistant Tests

ndash JE


s at 2700F

Plasma sprayed (G

dY)2 Si2 O

7 2450 cycles



ycles EB

-PVD

(YbG

dY)2 Si2 O


2450 4450

450

Hybrid H



Hybrid H


cycles 100h

2450 4450

2450 with

CM

AS 2450

ww

wnasagov

19


inistration

High S

tability and CM

AS

Resistance are E


igh M

elting Point C

oating and Multi-C

omponent C

ompositions A

rea A

Area B

ndash G

enerally improved C

MA

S

resistance of NAS

A R

ESi

System

at 1500degC 100 hr

ndash S


Rare earth elem



~9mol

)


MA

S melts

EDS E

ww

wnasagov

20


inistration

Advanced E

BC

-CM

C S

ystem D


igh Cycle and

Low Fatigue D

urability in High H




BC

with H



VI-M

I CM

C



igh Cycle and Low


ed at Stress


z at EB

C and 1 hr therm


Tested EB

C surface tem


perature 1482degC

(2700degF) with C

MA

S

-D


-D



C-C

MC

system


Test Condition Sum

mary

-EB

CC

VI-M


Pa) R


al LC

F$-

TEB

C-surface 1537degC

(2800degF)$-

Tbond coat 1482degC

(2700degF)$-

Tback C

MC

surface 1250degC

(2282degF)

ww

wnasagov

21


inistration

Advanced E

BC

-CM

C Fatigue Test w

ith CM

AS

and in Steam

Jet Tested 300 h D

urability in High H


-A

dvanced Hf-N

dYb silicate-N

dYbS

i bond coat EB

C coatings on 3D

architecture C

VI-P

IP S

iC-S

iC C

MC

(EB

-PV

D processing)



Surface view C

MA

S 35m

gcm2)

Back view

CM

AS

35mgcm

2)

ww

wnasagov


inistration

EBC

System

Designs ndash E

ffects of Com


Com

positions -

An alternating H

fO2 -and R


-PV


fO2 -layer


EB

-PV

D P

rocessed EB

Cs alternating H



CM

AS


ww

wnasagov


inistration

Sum

mary

bullC

MA

S degradation rem



iCSiC

CM

C com

ponent systems

bullC

MA

S leads to low



s with

accelerated EBC

and CM

C degradations

bullN

AS

A advanced E

BC com


e promise for C

MA

S





BC com

positions and EBC

-CM

AS


zirconium and rare



AS

resistance bull

Also standardize C

MA


MA



bullC


MA

S resistance w

hile maintaining


ww

wnasagov

24


inistration

Acknow

ledgements

bullThe w


ASA Fundam




r Michael H


ww

wnasagov

25


inistration

CM

AS

Reaction K

inetics in Bond C

oats ndash S


MA

S m

elts ndash R


ndash M


plemented for im

proved thermom

echanical ndash

CM



100hr

RE incorporations

CM

AS

resistance

ww

wnasagov

26




Bond Coats

-CM

AS

Reaction R


Selected E

BC

systems

ndashH

fO2 -R

E-S




ndashC

MA



fO2


659-AE9762

150

EBC

s

EBC

s

HfO

2 -Si (Si-rich)

Yb

2 Si 2 O 7

250658-EBC H

fO2-Rare Earth-A

lumino Silicate

660-Y2Si2O


b2Si2O7

Strength MPa


100681-H

fO2-Si

669-9762 with CM


693-HfO

2-Si with CM


5000

200 400

600 800

1000 1200

1400 1600

Temperature degC


Yb

2 Si2 O7 C

MA

S reacted tensile Y

b2 Si2 O

7 CM

AS reacted


surface w

ww

nasagov 27


inistration


MAS R


the Rare

Earth S

ilicon High M

elting Point C

oating Com

positions

ndashD

emonstrated C

MA

S resistance

of NAS

A R

E-Si S

ystem at

1500degC 100 hr

ndash S


Rare earth elem




ol)

CM

AS m

elts

Area A

Area B

ww

wnasagov

28


inistration

EBC

CM

AS

Surface Initial N


eactions ndash

Ytterbium


AM

S

ndash M


pared to yttrium

Ytterbium


AS m

elts 50 Y


MA

S melts 5 h

h 1300degC

1500degC$

Yttrium


MA

S Y


MA

S melts 5 h

melts 50 h 1300degC

1500degC

A



ww

nasagov 13


inistration

Rare E

arth Apatite G

rain Grow

th ndash

Grain grow


es

Ytterbium

silicate system

50 hr 150 hr

200 hr

200 hr50 hr

150 hr

Yttrium

silicate system$

ww

wnasagov

14


inistration

Effect of C

MA

S R

eactions on Grain B

oundary Phases

ndash C

MA


l2 O3

content (17-22 mole

) bull

Eutectic region w

ith high Al2 O


elting point bull

Loss of SiO

2 due to volatility

200 hr 1500degC

NA

SA

modified

CM

AS

Grain


SiO

2 and high A

lumina

ww

wnasagov

15


inistration

Rare E


MA

S M

elts ndash

Non stoichiom


AS


ndash D


in apatite bull

Average AE

OR

E2 O


MA

S system

bull

Average AE

OR

E2 O


MA

S system

C


SiO2



RE

2 O3

AEO

Yttrium

Silicate EBC

Com


Ytterbium

Silicate EBC

ww

wnasagov

16


inistration

Advanced N

AS

A E

BC

Developm

ents

NA

SA advanced E

BC

systems em


2 -and ZrO2 -R

E2 O

3 -

EBC layer 2 region

EB

Cs

Mol

Mol

SiO

2 EB

C system

RE

2 Si2-x O

7-2x such as (YbG

dY) 2 S

i2-x O7-2x



(YbGdY) 2 S

i2-x O7-2x in

CM

AS

1300degC

(a)

(b)

ww

wnasagov

17


inistration E

xample of N

AS

A A

dvanced Environm

ental Barrier C

oating on S

iCSiC

CM

C System

s

Advanced EB

C coated vanes

HfO

2 -(YbG

dY)2 O

3

(YbG

dY)2 Si2-x O

7-2x

RESi(O

)+Hf B

ond Coat

Gd Y

b Y

O

Si

Yb

Gd Y

Si

Hf

A


2 -Multicom

ponent Rare E

arth silicate EB

Cs used for fundam



d-YbO+H


oated onto SiC

SiC

CM


B-P

VD


ww

wnasagov

18


inistration

CM

AS

Resistant Tests

ndash JE


s at 2700F

Plasma sprayed (G

dY)2 Si2 O

7 2450 cycles



ycles EB

-PVD

(YbG

dY)2 Si2 O


2450 4450

450

Hybrid H



Hybrid H


cycles 100h

2450 4450

2450 with

CM

AS 2450

ww

wnasagov

19


inistration

High S

tability and CM

AS

Resistance are E


igh M

elting Point C

oating and Multi-C

omponent C

ompositions A

rea A

Area B

ndash G

enerally improved C

MA

S

resistance of NAS

A R

ESi

System

at 1500degC 100 hr

ndash S


Rare earth elem



~9mol

)


MA

S melts

EDS E

ww

wnasagov

20


inistration

Advanced E

BC

-CM

C S

ystem D


igh Cycle and

Low Fatigue D

urability in High H




BC

with H



VI-M

I CM

C



igh Cycle and Low


ed at Stress


z at EB

C and 1 hr therm


Tested EB

C surface tem


perature 1482degC

(2700degF) with C

MA

S

-D


-D



C-C

MC

system


Test Condition Sum

mary

-EB

CC

VI-M


Pa) R


al LC

F$-

TEB

C-surface 1537degC

(2800degF)$-

Tbond coat 1482degC

(2700degF)$-

Tback C

MC

surface 1250degC

(2282degF)

ww

wnasagov

21


inistration

Advanced E

BC

-CM

C Fatigue Test w

ith CM

AS

and in Steam

Jet Tested 300 h D

urability in High H


-A

dvanced Hf-N

dYb silicate-N

dYbS

i bond coat EB

C coatings on 3D

architecture C

VI-P

IP S

iC-S

iC C

MC

(EB

-PV

D processing)



Surface view C

MA

S 35m

gcm2)

Back view

CM

AS

35mgcm

2)

ww

wnasagov


inistration

EBC

System

Designs ndash E

ffects of Com


Com

positions -

An alternating H

fO2 -and R


-PV


fO2 -layer


EB

-PV

D P

rocessed EB

Cs alternating H



CM

AS


ww

wnasagov


inistration

Sum

mary

bullC

MA

S degradation rem



iCSiC

CM

C com

ponent systems

bullC

MA

S leads to low



s with

accelerated EBC

and CM

C degradations

bullN

AS

A advanced E

BC com


e promise for C

MA

S





BC com

positions and EBC

-CM

AS


zirconium and rare



AS

resistance bull

Also standardize C

MA


MA



bullC


MA

S resistance w

hile maintaining


ww

wnasagov

24


inistration

Acknow

ledgements

bullThe w


ASA Fundam




r Michael H


ww

wnasagov

25


inistration

CM

AS

Reaction K

inetics in Bond C

oats ndash S


MA

S m

elts ndash R


ndash M


plemented for im

proved thermom

echanical ndash

CM



100hr

RE incorporations

CM

AS

resistance

ww

wnasagov

26




Bond Coats

-CM

AS

Reaction R


Selected E

BC

systems

ndashH

fO2 -R

E-S




ndashC

MA



fO2


659-AE9762

150

EBC

s

EBC

s

HfO

2 -Si (Si-rich)

Yb

2 Si 2 O 7

250658-EBC H

fO2-Rare Earth-A

lumino Silicate

660-Y2Si2O


b2Si2O7

Strength MPa


100681-H

fO2-Si

669-9762 with CM


693-HfO

2-Si with CM


5000

200 400

600 800

1000 1200

1400 1600

Temperature degC


Yb

2 Si2 O7 C

MA

S reacted tensile Y

b2 Si2 O

7 CM

AS reacted


surface w

ww

nasagov 27


inistration


MAS R


the Rare

Earth S

ilicon High M

elting Point C

oating Com

positions

ndashD

emonstrated C

MA

S resistance

of NAS

A R

E-Si S

ystem at

1500degC 100 hr

ndash S


Rare earth elem




ol)

CM

AS m

elts

Area A

Area B

ww

wnasagov

28


inistration

Rare E

arth Apatite G

rain Grow

th ndash

Grain grow


es

Ytterbium

silicate system

50 hr 150 hr

200 hr

200 hr50 hr

150 hr

Yttrium

silicate system$

ww

wnasagov

14


inistration

Effect of C

MA

S R

eactions on Grain B

oundary Phases

ndash C

MA


l2 O3

content (17-22 mole

) bull

Eutectic region w

ith high Al2 O


elting point bull

Loss of SiO

2 due to volatility

200 hr 1500degC

NA

SA

modified

CM

AS

Grain


SiO

2 and high A

lumina

ww

wnasagov

15


inistration

Rare E


MA

S M

elts ndash

Non stoichiom


AS


ndash D


in apatite bull

Average AE

OR

E2 O


MA

S system

bull

Average AE

OR

E2 O


MA

S system

C


SiO2



RE

2 O3

AEO

Yttrium

Silicate EBC

Com


Ytterbium

Silicate EBC

ww

wnasagov

16


inistration

Advanced N

AS

A E

BC

Developm

ents

NA

SA advanced E

BC

systems em


2 -and ZrO2 -R

E2 O

3 -

EBC layer 2 region

EB

Cs

Mol

Mol

SiO

2 EB

C system

RE

2 Si2-x O

7-2x such as (YbG

dY) 2 S

i2-x O7-2x



(YbGdY) 2 S

i2-x O7-2x in

CM

AS

1300degC

(a)

(b)

ww

wnasagov

17


inistration E

xample of N

AS

A A

dvanced Environm

ental Barrier C

oating on S

iCSiC

CM

C System

s

Advanced EB

C coated vanes

HfO

2 -(YbG

dY)2 O

3

(YbG

dY)2 Si2-x O

7-2x

RESi(O

)+Hf B

ond Coat

Gd Y

b Y

O

Si

Yb

Gd Y

Si

Hf

A


2 -Multicom

ponent Rare E

arth silicate EB

Cs used for fundam



d-YbO+H


oated onto SiC

SiC

CM


B-P

VD


ww

wnasagov

18


inistration

CM

AS

Resistant Tests

ndash JE


s at 2700F

Plasma sprayed (G

dY)2 Si2 O

7 2450 cycles



ycles EB

-PVD

(YbG

dY)2 Si2 O


2450 4450

450

Hybrid H



Hybrid H


cycles 100h

2450 4450

2450 with

CM

AS 2450

ww

wnasagov

19


inistration

High S

tability and CM

AS

Resistance are E


igh M

elting Point C

oating and Multi-C

omponent C

ompositions A

rea A

Area B

ndash G

enerally improved C

MA

S

resistance of NAS

A R

ESi

System

at 1500degC 100 hr

ndash S


Rare earth elem



~9mol

)


MA

S melts

EDS E

ww

wnasagov

20


inistration

Advanced E

BC

-CM

C S

ystem D


igh Cycle and

Low Fatigue D

urability in High H




BC

with H



VI-M

I CM

C



igh Cycle and Low


ed at Stress


z at EB

C and 1 hr therm


Tested EB

C surface tem


perature 1482degC

(2700degF) with C

MA

S

-D


-D



C-C

MC

system


Test Condition Sum

mary

-EB

CC

VI-M


Pa) R


al LC

F$-

TEB

C-surface 1537degC

(2800degF)$-

Tbond coat 1482degC

(2700degF)$-

Tback C

MC

surface 1250degC

(2282degF)

ww

wnasagov

21


inistration

Advanced E

BC

-CM

C Fatigue Test w

ith CM

AS

and in Steam

Jet Tested 300 h D

urability in High H


-A

dvanced Hf-N

dYb silicate-N

dYbS

i bond coat EB

C coatings on 3D

architecture C

VI-P

IP S

iC-S

iC C

MC

(EB

-PV

D processing)



Surface view C

MA

S 35m

gcm2)

Back view

CM

AS

35mgcm

2)

ww

wnasagov


inistration

EBC

System

Designs ndash E

ffects of Com


Com

positions -

An alternating H

fO2 -and R


-PV


fO2 -layer


EB

-PV

D P

rocessed EB

Cs alternating H



CM

AS


ww

wnasagov


inistration

Sum

mary

bullC

MA

S degradation rem



iCSiC

CM

C com

ponent systems

bullC

MA

S leads to low



s with

accelerated EBC

and CM

C degradations

bullN

AS

A advanced E

BC com


e promise for C

MA

S





BC com

positions and EBC

-CM

AS


zirconium and rare



AS

resistance bull

Also standardize C

MA


MA



bullC


MA

S resistance w

hile maintaining


ww

wnasagov

24


inistration

Acknow

ledgements

bullThe w


ASA Fundam




r Michael H


ww

wnasagov

25


inistration

CM

AS

Reaction K

inetics in Bond C

oats ndash S


MA

S m

elts ndash R


ndash M


plemented for im

proved thermom

echanical ndash

CM



100hr

RE incorporations

CM

AS

resistance

ww

wnasagov

26




Bond Coats

-CM

AS

Reaction R


Selected E

BC

systems

ndashH

fO2 -R

E-S




ndashC

MA



fO2


659-AE9762

150

EBC

s

EBC

s

HfO

2 -Si (Si-rich)

Yb

2 Si 2 O 7

250658-EBC H

fO2-Rare Earth-A

lumino Silicate

660-Y2Si2O


b2Si2O7

Strength MPa


100681-H

fO2-Si

669-9762 with CM


693-HfO

2-Si with CM


5000

200 400

600 800

1000 1200

1400 1600

Temperature degC


Yb

2 Si2 O7 C

MA

S reacted tensile Y

b2 Si2 O

7 CM

AS reacted


surface w

ww

nasagov 27


inistration


MAS R


the Rare

Earth S

ilicon High M

elting Point C

oating Com

positions

ndashD

emonstrated C

MA

S resistance

of NAS

A R

E-Si S

ystem at

1500degC 100 hr

ndash S


Rare earth elem




ol)

CM

AS m

elts

Area A

Area B

ww

wnasagov

28


inistration

Effect of C

MA

S R

eactions on Grain B

oundary Phases

ndash C

MA


l2 O3

content (17-22 mole

) bull

Eutectic region w

ith high Al2 O


elting point bull

Loss of SiO

2 due to volatility

200 hr 1500degC

NA

SA

modified

CM

AS

Grain


SiO

2 and high A

lumina

ww

wnasagov

15


inistration

Rare E


MA

S M

elts ndash

Non stoichiom


AS


ndash D


in apatite bull

Average AE

OR

E2 O


MA

S system

bull

Average AE

OR

E2 O


MA

S system

C


SiO2



RE

2 O3

AEO

Yttrium

Silicate EBC

Com


Ytterbium

Silicate EBC

ww

wnasagov

16


inistration

Advanced N

AS

A E

BC

Developm

ents

NA

SA advanced E

BC

systems em


2 -and ZrO2 -R

E2 O

3 -

EBC layer 2 region

EB

Cs

Mol

Mol

SiO

2 EB

C system

RE

2 Si2-x O

7-2x such as (YbG

dY) 2 S

i2-x O7-2x



(YbGdY) 2 S

i2-x O7-2x in

CM

AS

1300degC

(a)

(b)

ww

wnasagov

17


inistration E

xample of N

AS

A A

dvanced Environm

ental Barrier C

oating on S

iCSiC

CM

C System

s

Advanced EB

C coated vanes

HfO

2 -(YbG

dY)2 O

3

(YbG

dY)2 Si2-x O

7-2x

RESi(O

)+Hf B

ond Coat

Gd Y

b Y

O

Si

Yb

Gd Y

Si

Hf

A


2 -Multicom

ponent Rare E

arth silicate EB

Cs used for fundam



d-YbO+H


oated onto SiC

SiC

CM


B-P

VD


ww

wnasagov

18


inistration

CM

AS

Resistant Tests

ndash JE


s at 2700F

Plasma sprayed (G

dY)2 Si2 O

7 2450 cycles



ycles EB

-PVD

(YbG

dY)2 Si2 O


2450 4450

450

Hybrid H



Hybrid H


cycles 100h

2450 4450

2450 with

CM

AS 2450

ww

wnasagov

19


inistration

High S

tability and CM

AS

Resistance are E


igh M

elting Point C

oating and Multi-C

omponent C

ompositions A

rea A

Area B

ndash G

enerally improved C

MA

S

resistance of NAS

A R

ESi

System

at 1500degC 100 hr

ndash S


Rare earth elem



~9mol

)


MA

S melts

EDS E

ww

wnasagov

20


inistration

Advanced E

BC

-CM

C S

ystem D


igh Cycle and

Low Fatigue D

urability in High H




BC

with H



VI-M

I CM

C



igh Cycle and Low


ed at Stress


z at EB

C and 1 hr therm


Tested EB

C surface tem


perature 1482degC

(2700degF) with C

MA

S

-D


-D



C-C

MC

system


Test Condition Sum

mary

-EB

CC

VI-M


Pa) R


al LC

F$-

TEB

C-surface 1537degC

(2800degF)$-

Tbond coat 1482degC

(2700degF)$-

Tback C

MC

surface 1250degC

(2282degF)

ww

wnasagov

21


inistration

Advanced E

BC

-CM

C Fatigue Test w

ith CM

AS

and in Steam

Jet Tested 300 h D

urability in High H


-A

dvanced Hf-N

dYb silicate-N

dYbS

i bond coat EB

C coatings on 3D

architecture C

VI-P

IP S

iC-S

iC C

MC

(EB

-PV

D processing)



Surface view C

MA

S 35m

gcm2)

Back view

CM

AS

35mgcm

2)

ww

wnasagov


inistration

EBC

System

Designs ndash E

ffects of Com


Com

positions -

An alternating H

fO2 -and R


-PV


fO2 -layer


EB

-PV

D P

rocessed EB

Cs alternating H



CM

AS


ww

wnasagov


inistration

Sum

mary

bullC

MA

S degradation rem



iCSiC

CM

C com

ponent systems

bullC

MA

S leads to low



s with

accelerated EBC

and CM

C degradations

bullN

AS

A advanced E

BC com


e promise for C

MA

S





BC com

positions and EBC

-CM

AS


zirconium and rare



AS

resistance bull

Also standardize C

MA


MA



bullC


MA

S resistance w

hile maintaining


ww

wnasagov

24


inistration

Acknow

ledgements

bullThe w


ASA Fundam




r Michael H


ww

wnasagov

25


inistration

CM

AS

Reaction K

inetics in Bond C

oats ndash S


MA

S m

elts ndash R


ndash M


plemented for im

proved thermom

echanical ndash

CM



100hr

RE incorporations

CM

AS

resistance

ww

wnasagov

26




Bond Coats

-CM

AS

Reaction R


Selected E

BC

systems

ndashH

fO2 -R

E-S




ndashC

MA



fO2


659-AE9762

150

EBC

s

EBC

s

HfO

2 -Si (Si-rich)

Yb

2 Si 2 O 7

250658-EBC H

fO2-Rare Earth-A

lumino Silicate

660-Y2Si2O


b2Si2O7

Strength MPa


100681-H

fO2-Si

669-9762 with CM


693-HfO

2-Si with CM


5000

200 400

600 800

1000 1200

1400 1600

Temperature degC


Yb

2 Si2 O7 C

MA

S reacted tensile Y

b2 Si2 O

7 CM

AS reacted


surface w

ww

nasagov 27


inistration


MAS R


the Rare

Earth S

ilicon High M

elting Point C

oating Com

positions

ndashD

emonstrated C

MA

S resistance

of NAS

A R

E-Si S

ystem at

1500degC 100 hr

ndash S


Rare earth elem




ol)

CM

AS m

elts

Area A

Area B

ww

wnasagov

28


inistration

Rare E


MA

S M

elts ndash

Non stoichiom


AS


ndash D


in apatite bull

Average AE

OR

E2 O


MA

S system

bull

Average AE

OR

E2 O


MA

S system

C


SiO2



RE

2 O3

AEO

Yttrium

Silicate EBC

Com


Ytterbium

Silicate EBC

ww

wnasagov

16


inistration

Advanced N

AS

A E

BC

Developm

ents

NA

SA advanced E

BC

systems em


2 -and ZrO2 -R

E2 O

3 -

EBC layer 2 region

EB

Cs

Mol

Mol

SiO

2 EB

C system

RE

2 Si2-x O

7-2x such as (YbG

dY) 2 S

i2-x O7-2x



(YbGdY) 2 S

i2-x O7-2x in

CM

AS

1300degC

(a)

(b)

ww

wnasagov

17


inistration E

xample of N

AS

A A

dvanced Environm

ental Barrier C

oating on S

iCSiC

CM

C System

s

Advanced EB

C coated vanes

HfO

2 -(YbG

dY)2 O

3

(YbG

dY)2 Si2-x O

7-2x

RESi(O

)+Hf B

ond Coat

Gd Y

b Y

O

Si

Yb

Gd Y

Si

Hf

A


2 -Multicom

ponent Rare E

arth silicate EB

Cs used for fundam



d-YbO+H


oated onto SiC

SiC

CM


B-P

VD


ww

wnasagov

18


inistration

CM

AS

Resistant Tests

ndash JE


s at 2700F

Plasma sprayed (G

dY)2 Si2 O

7 2450 cycles



ycles EB

-PVD

(YbG

dY)2 Si2 O


2450 4450

450

Hybrid H



Hybrid H


cycles 100h

2450 4450

2450 with

CM

AS 2450

ww

wnasagov

19


inistration

High S

tability and CM

AS

Resistance are E


igh M

elting Point C

oating and Multi-C

omponent C

ompositions A

rea A

Area B

ndash G

enerally improved C

MA

S

resistance of NAS

A R

ESi

System

at 1500degC 100 hr

ndash S


Rare earth elem



~9mol

)


MA

S melts

EDS E

ww

wnasagov

20


inistration

Advanced E

BC

-CM

C S

ystem D


igh Cycle and

Low Fatigue D

urability in High H




BC

with H



VI-M

I CM

C



igh Cycle and Low


ed at Stress


z at EB

C and 1 hr therm


Tested EB

C surface tem


perature 1482degC

(2700degF) with C

MA

S

-D


-D



C-C

MC

system


Test Condition Sum

mary

-EB

CC

VI-M


Pa) R


al LC

F$-

TEB

C-surface 1537degC

(2800degF)$-

Tbond coat 1482degC

(2700degF)$-

Tback C

MC

surface 1250degC

(2282degF)

ww

wnasagov

21


inistration

Advanced E

BC

-CM

C Fatigue Test w

ith CM

AS

and in Steam

Jet Tested 300 h D

urability in High H


-A

dvanced Hf-N

dYb silicate-N

dYbS

i bond coat EB

C coatings on 3D

architecture C

VI-P

IP S

iC-S

iC C

MC

(EB

-PV

D processing)



Surface view C

MA

S 35m

gcm2)

Back view

CM

AS

35mgcm

2)

ww

wnasagov


inistration

EBC

System

Designs ndash E

ffects of Com


Com

positions -

An alternating H

fO2 -and R


-PV


fO2 -layer


EB

-PV

D P

rocessed EB

Cs alternating H



CM

AS


ww

wnasagov


inistration

Sum

mary

bullC

MA

S degradation rem



iCSiC

CM

C com

ponent systems

bullC

MA

S leads to low



s with

accelerated EBC

and CM

C degradations

bullN

AS

A advanced E

BC com


e promise for C

MA

S





BC com

positions and EBC

-CM

AS


zirconium and rare



AS

resistance bull

Also standardize C

MA


MA



bullC


MA

S resistance w

hile maintaining


ww

wnasagov

24


inistration

Acknow

ledgements

bullThe w


ASA Fundam




r Michael H


ww

wnasagov

25


inistration

CM

AS

Reaction K

inetics in Bond C

oats ndash S


MA

S m

elts ndash R


ndash M


plemented for im

proved thermom

echanical ndash

CM



100hr

RE incorporations

CM

AS

resistance

ww

wnasagov

26




Bond Coats

-CM

AS

Reaction R


Selected E

BC

systems

ndashH

fO2 -R

E-S




ndashC

MA



fO2


659-AE9762

150

EBC

s

EBC

s

HfO

2 -Si (Si-rich)

Yb

2 Si 2 O 7

250658-EBC H

fO2-Rare Earth-A

lumino Silicate

660-Y2Si2O


b2Si2O7

Strength MPa


100681-H

fO2-Si

669-9762 with CM


693-HfO

2-Si with CM


5000

200 400

600 800

1000 1200

1400 1600

Temperature degC


Yb

2 Si2 O7 C

MA

S reacted tensile Y

b2 Si2 O

7 CM

AS reacted


surface w

ww

nasagov 27


inistration


MAS R


the Rare

Earth S

ilicon High M

elting Point C

oating Com

positions

ndashD

emonstrated C

MA

S resistance

of NAS

A R

E-Si S

ystem at

1500degC 100 hr

ndash S


Rare earth elem




ol)

CM

AS m

elts

Area A

Area B

ww

wnasagov

28


inistration

Advanced N

AS

A E

BC

Developm

ents

NA

SA advanced E

BC

systems em


2 -and ZrO2 -R

E2 O

3 -

EBC layer 2 region

EB

Cs

Mol

Mol

SiO

2 EB

C system

RE

2 Si2-x O

7-2x such as (YbG

dY) 2 S

i2-x O7-2x



(YbGdY) 2 S

i2-x O7-2x in

CM

AS

1300degC

(a)

(b)

ww

wnasagov

17


inistration E

xample of N

AS

A A

dvanced Environm

ental Barrier C

oating on S

iCSiC

CM

C System

s

Advanced EB

C coated vanes

HfO

2 -(YbG

dY)2 O

3

(YbG

dY)2 Si2-x O

7-2x

RESi(O

)+Hf B

ond Coat

Gd Y

b Y

O

Si

Yb

Gd Y

Si

Hf

A


2 -Multicom

ponent Rare E

arth silicate EB

Cs used for fundam



d-YbO+H


oated onto SiC

SiC

CM


B-P

VD


ww

wnasagov

18


inistration

CM

AS

Resistant Tests

ndash JE


s at 2700F

Plasma sprayed (G

dY)2 Si2 O

7 2450 cycles



ycles EB

-PVD

(YbG

dY)2 Si2 O


2450 4450

450

Hybrid H



Hybrid H


cycles 100h

2450 4450

2450 with

CM

AS 2450

ww

wnasagov

19


inistration

High S

tability and CM

AS

Resistance are E


igh M

elting Point C

oating and Multi-C

omponent C

ompositions A

rea A

Area B

ndash G

enerally improved C

MA

S

resistance of NAS

A R

ESi

System

at 1500degC 100 hr

ndash S


Rare earth elem



~9mol

)


MA

S melts

EDS E

ww

wnasagov

20


inistration

Advanced E

BC

-CM

C S

ystem D


igh Cycle and

Low Fatigue D

urability in High H




BC

with H



VI-M

I CM

C



igh Cycle and Low


ed at Stress


z at EB

C and 1 hr therm


Tested EB

C surface tem


perature 1482degC

(2700degF) with C

MA

S

-D


-D



C-C

MC

system


Test Condition Sum

mary

-EB

CC

VI-M


Pa) R


al LC

F$-

TEB

C-surface 1537degC

(2800degF)$-

Tbond coat 1482degC

(2700degF)$-

Tback C

MC

surface 1250degC

(2282degF)

ww

wnasagov

21


inistration

Advanced E

BC

-CM

C Fatigue Test w

ith CM

AS

and in Steam

Jet Tested 300 h D

urability in High H


-A

dvanced Hf-N

dYb silicate-N

dYbS

i bond coat EB

C coatings on 3D

architecture C

VI-P

IP S

iC-S

iC C

MC

(EB

-PV

D processing)



Surface view C

MA

S 35m

gcm2)

Back view

CM

AS

35mgcm

2)

ww

wnasagov


inistration

EBC

System

Designs ndash E

ffects of Com


Com

positions -

An alternating H

fO2 -and R


-PV


fO2 -layer


EB

-PV

D P

rocessed EB

Cs alternating H



CM

AS


ww

wnasagov


inistration

Sum

mary

bullC

MA

S degradation rem



iCSiC

CM

C com

ponent systems

bullC

MA

S leads to low



s with

accelerated EBC

and CM

C degradations

bullN

AS

A advanced E

BC com


e promise for C

MA

S





BC com

positions and EBC

-CM

AS


zirconium and rare



AS

resistance bull

Also standardize C

MA


MA



bullC


MA

S resistance w

hile maintaining


ww

wnasagov

24


inistration

Acknow

ledgements

bullThe w


ASA Fundam




r Michael H


ww

wnasagov

25


inistration

CM

AS

Reaction K

inetics in Bond C

oats ndash S


MA

S m

elts ndash R


ndash M


plemented for im

proved thermom

echanical ndash

CM



100hr

RE incorporations

CM

AS

resistance

ww

wnasagov

26




Bond Coats

-CM

AS

Reaction R


Selected E

BC

systems

ndashH

fO2 -R

E-S




ndashC

MA



fO2


659-AE9762

150

EBC

s

EBC

s

HfO

2 -Si (Si-rich)

Yb

2 Si 2 O 7

250658-EBC H

fO2-Rare Earth-A

lumino Silicate

660-Y2Si2O


b2Si2O7

Strength MPa


100681-H

fO2-Si

669-9762 with CM


693-HfO

2-Si with CM


5000

200 400

600 800

1000 1200

1400 1600

Temperature degC


Yb

2 Si2 O7 C

MA

S reacted tensile Y

b2 Si2 O

7 CM

AS reacted


surface w

ww

nasagov 27


inistration


MAS R


the Rare

Earth S

ilicon High M

elting Point C

oating Com

positions

ndashD

emonstrated C

MA

S resistance

of NAS

A R

E-Si S

ystem at

1500degC 100 hr

ndash S


Rare earth elem




ol)

CM

AS m

elts

Area A

Area B

ww

wnasagov

28


inistration E

xample of N

AS

A A

dvanced Environm

ental Barrier C

oating on S

iCSiC

CM

C System

s

Advanced EB

C coated vanes

HfO

2 -(YbG

dY)2 O

3

(YbG

dY)2 Si2-x O

7-2x

RESi(O

)+Hf B

ond Coat

Gd Y

b Y

O

Si

Yb

Gd Y

Si

Hf

A


2 -Multicom

ponent Rare E

arth silicate EB

Cs used for fundam



d-YbO+H


oated onto SiC

SiC

CM


B-P

VD


ww

wnasagov

18


inistration

CM

AS

Resistant Tests

ndash JE


s at 2700F

Plasma sprayed (G

dY)2 Si2 O

7 2450 cycles



ycles EB

-PVD

(YbG

dY)2 Si2 O


2450 4450

450

Hybrid H



Hybrid H


cycles 100h

2450 4450

2450 with

CM

AS 2450

ww

wnasagov

19


inistration

High S

tability and CM

AS

Resistance are E


igh M

elting Point C

oating and Multi-C

omponent C

ompositions A

rea A

Area B

ndash G

enerally improved C

MA

S

resistance of NAS

A R

ESi

System

at 1500degC 100 hr

ndash S


Rare earth elem



~9mol

)


MA

S melts

EDS E

ww

wnasagov

20


inistration

Advanced E

BC

-CM

C S

ystem D


igh Cycle and

Low Fatigue D

urability in High H




BC

with H



VI-M

I CM

C



igh Cycle and Low


ed at Stress


z at EB

C and 1 hr therm


Tested EB

C surface tem


perature 1482degC

(2700degF) with C

MA

S

-D


-D



C-C

MC

system


Test Condition Sum

mary

-EB

CC

VI-M


Pa) R


al LC

F$-

TEB

C-surface 1537degC

(2800degF)$-

Tbond coat 1482degC

(2700degF)$-

Tback C

MC

surface 1250degC

(2282degF)

ww

wnasagov

21


inistration

Advanced E

BC

-CM

C Fatigue Test w

ith CM

AS

and in Steam

Jet Tested 300 h D

urability in High H


-A

dvanced Hf-N

dYb silicate-N

dYbS

i bond coat EB

C coatings on 3D

architecture C

VI-P

IP S

iC-S

iC C

MC

(EB

-PV

D processing)



Surface view C

MA

S 35m

gcm2)

Back view

CM

AS

35mgcm

2)

ww

wnasagov


inistration

EBC

System

Designs ndash E

ffects of Com


Com

positions -

An alternating H

fO2 -and R


-PV


fO2 -layer


EB

-PV

D P

rocessed EB

Cs alternating H



CM

AS


ww

wnasagov


inistration

Sum

mary

bullC

MA

S degradation rem



iCSiC

CM

C com

ponent systems

bullC

MA

S leads to low



s with

accelerated EBC

and CM

C degradations

bullN

AS

A advanced E

BC com


e promise for C

MA

S





BC com

positions and EBC

-CM

AS


zirconium and rare



AS

resistance bull

Also standardize C

MA


MA



bullC


MA

S resistance w

hile maintaining


ww

wnasagov

24


inistration

Acknow

ledgements

bullThe w


ASA Fundam




r Michael H


ww

wnasagov

25


inistration

CM

AS

Reaction K

inetics in Bond C

oats ndash S


MA

S m

elts ndash R


ndash M


plemented for im

proved thermom

echanical ndash

CM



100hr

RE incorporations

CM

AS

resistance

ww

wnasagov

26




Bond Coats

-CM

AS

Reaction R


Selected E

BC

systems

ndashH

fO2 -R

E-S




ndashC

MA



fO2


659-AE9762

150

EBC

s

EBC

s

HfO

2 -Si (Si-rich)

Yb

2 Si 2 O 7

250658-EBC H

fO2-Rare Earth-A

lumino Silicate

660-Y2Si2O


b2Si2O7

Strength MPa


100681-H

fO2-Si

669-9762 with CM


693-HfO

2-Si with CM


5000

200 400

600 800

1000 1200

1400 1600

Temperature degC


Yb

2 Si2 O7 C

MA

S reacted tensile Y

b2 Si2 O

7 CM

AS reacted


surface w

ww

nasagov 27


inistration


MAS R


the Rare

Earth S

ilicon High M

elting Point C

oating Com

positions

ndashD

emonstrated C

MA

S resistance

of NAS

A R

E-Si S

ystem at

1500degC 100 hr

ndash S


Rare earth elem




ol)

CM

AS m

elts

Area A

Area B

ww

wnasagov

28


inistration

CM

AS

Resistant Tests

ndash JE


s at 2700F

Plasma sprayed (G

dY)2 Si2 O

7 2450 cycles



ycles EB

-PVD

(YbG

dY)2 Si2 O


2450 4450

450

Hybrid H



Hybrid H


cycles 100h

2450 4450

2450 with

CM

AS 2450

ww

wnasagov

19


inistration

High S

tability and CM

AS

Resistance are E


igh M

elting Point C

oating and Multi-C

omponent C

ompositions A

rea A

Area B

ndash G

enerally improved C

MA

S

resistance of NAS

A R

ESi

System

at 1500degC 100 hr

ndash S


Rare earth elem



~9mol

)


MA

S melts

EDS E

ww

wnasagov

20


inistration

Advanced E

BC

-CM

C S

ystem D


igh Cycle and

Low Fatigue D

urability in High H




BC

with H



VI-M

I CM

C



igh Cycle and Low


ed at Stress


z at EB

C and 1 hr therm


Tested EB

C surface tem


perature 1482degC

(2700degF) with C

MA

S

-D


-D



C-C

MC

system


Test Condition Sum

mary

-EB

CC

VI-M


Pa) R


al LC

F$-

TEB

C-surface 1537degC

(2800degF)$-

Tbond coat 1482degC

(2700degF)$-

Tback C

MC

surface 1250degC

(2282degF)

ww

wnasagov

21


inistration

Advanced E

BC

-CM

C Fatigue Test w

ith CM

AS

and in Steam

Jet Tested 300 h D

urability in High H


-A

dvanced Hf-N

dYb silicate-N

dYbS

i bond coat EB

C coatings on 3D

architecture C

VI-P

IP S

iC-S

iC C

MC

(EB

-PV

D processing)



Surface view C

MA

S 35m

gcm2)

Back view

CM

AS

35mgcm

2)

ww

wnasagov


inistration

EBC

System

Designs ndash E

ffects of Com


Com

positions -

An alternating H

fO2 -and R


-PV


fO2 -layer


EB

-PV

D P

rocessed EB

Cs alternating H



CM

AS


ww

wnasagov


inistration

Sum

mary

bullC

MA

S degradation rem



iCSiC

CM

C com

ponent systems

bullC

MA

S leads to low



s with

accelerated EBC

and CM

C degradations

bullN

AS

A advanced E

BC com


e promise for C

MA

S





BC com

positions and EBC

-CM

AS


zirconium and rare



AS

resistance bull

Also standardize C

MA


MA



bullC


MA

S resistance w

hile maintaining


ww

wnasagov

24


inistration

Acknow

ledgements

bullThe w


ASA Fundam




r Michael H


ww

wnasagov

25


inistration

CM

AS

Reaction K

inetics in Bond C

oats ndash S


MA

S m

elts ndash R


ndash M


plemented for im

proved thermom

echanical ndash

CM



100hr

RE incorporations

CM

AS

resistance

ww

wnasagov

26




Bond Coats

-CM

AS

Reaction R


Selected E

BC

systems

ndashH

fO2 -R

E-S




ndashC

MA



fO2


659-AE9762

150

EBC

s

EBC

s

HfO

2 -Si (Si-rich)

Yb

2 Si 2 O 7

250658-EBC H

fO2-Rare Earth-A

lumino Silicate

660-Y2Si2O


b2Si2O7

Strength MPa


100681-H

fO2-Si

669-9762 with CM


693-HfO

2-Si with CM


5000

200 400

600 800

1000 1200

1400 1600

Temperature degC


Yb

2 Si2 O7 C

MA

S reacted tensile Y

b2 Si2 O

7 CM

AS reacted


surface w

ww

nasagov 27


inistration


MAS R


the Rare

Earth S

ilicon High M

elting Point C

oating Com

positions

ndashD

emonstrated C

MA

S resistance

of NAS

A R

E-Si S

ystem at

1500degC 100 hr

ndash S


Rare earth elem




ol)

CM

AS m

elts

Area A

Area B

ww

wnasagov

28


inistration

High S

tability and CM

AS

Resistance are E


igh M

elting Point C

oating and Multi-C

omponent C

ompositions A

rea A

Area B

ndash G

enerally improved C

MA

S

resistance of NAS

A R

ESi

System

at 1500degC 100 hr

ndash S


Rare earth elem



~9mol

)


MA

S melts

EDS E

ww

wnasagov

20


inistration

Advanced E

BC

-CM

C S

ystem D


igh Cycle and

Low Fatigue D

urability in High H




BC

with H



VI-M

I CM

C



igh Cycle and Low


ed at Stress


z at EB

C and 1 hr therm


Tested EB

C surface tem


perature 1482degC

(2700degF) with C

MA

S

-D


-D



C-C

MC

system


Test Condition Sum

mary

-EB

CC

VI-M


Pa) R


al LC

F$-

TEB

C-surface 1537degC

(2800degF)$-

Tbond coat 1482degC

(2700degF)$-

Tback C

MC

surface 1250degC

(2282degF)

ww

wnasagov

21


inistration

Advanced E

BC

-CM

C Fatigue Test w

ith CM

AS

and in Steam

Jet Tested 300 h D

urability in High H


-A

dvanced Hf-N

dYb silicate-N

dYbS

i bond coat EB

C coatings on 3D

architecture C

VI-P

IP S

iC-S

iC C

MC

(EB

-PV

D processing)



Surface view C

MA

S 35m

gcm2)

Back view

CM

AS

35mgcm

2)

ww

wnasagov


inistration

EBC

System

Designs ndash E

ffects of Com


Com

positions -

An alternating H

fO2 -and R


-PV


fO2 -layer


EB

-PV

D P

rocessed EB

Cs alternating H



CM

AS


ww

wnasagov


inistration

Sum

mary

bullC

MA

S degradation rem



iCSiC

CM

C com

ponent systems

bullC

MA

S leads to low



s with

accelerated EBC

and CM

C degradations

bullN

AS

A advanced E

BC com


e promise for C

MA

S





BC com

positions and EBC

-CM

AS


zirconium and rare



AS

resistance bull

Also standardize C

MA


MA



bullC


MA

S resistance w

hile maintaining


ww

wnasagov

24


inistration

Acknow

ledgements

bullThe w


ASA Fundam




r Michael H


ww

wnasagov

25


inistration

CM

AS

Reaction K

inetics in Bond C

oats ndash S


MA

S m

elts ndash R


ndash M


plemented for im

proved thermom

echanical ndash

CM



100hr

RE incorporations

CM

AS

resistance

ww

wnasagov

26




Bond Coats

-CM

AS

Reaction R


Selected E

BC

systems

ndashH

fO2 -R

E-S




ndashC

MA



fO2


659-AE9762

150

EBC

s

EBC

s

HfO

2 -Si (Si-rich)

Yb

2 Si 2 O 7

250658-EBC H

fO2-Rare Earth-A

lumino Silicate

660-Y2Si2O


b2Si2O7

Strength MPa


100681-H

fO2-Si

669-9762 with CM


693-HfO

2-Si with CM


5000

200 400

600 800

1000 1200

1400 1600

Temperature degC


Yb

2 Si2 O7 C

MA

S reacted tensile Y

b2 Si2 O

7 CM

AS reacted


surface w

ww

nasagov 27


inistration


MAS R


the Rare

Earth S

ilicon High M

elting Point C

oating Com

positions

ndashD

emonstrated C

MA

S resistance

of NAS

A R

E-Si S

ystem at

1500degC 100 hr

ndash S


Rare earth elem




ol)

CM

AS m

elts

Area A

Area B

ww

wnasagov

28


inistration

Advanced E

BC

-CM

C S

ystem D


igh Cycle and

Low Fatigue D

urability in High H




BC

with H



VI-M

I CM

C



igh Cycle and Low


ed at Stress


z at EB

C and 1 hr therm


Tested EB

C surface tem


perature 1482degC

(2700degF) with C

MA

S

-D


-D



C-C

MC

system


Test Condition Sum

mary

-EB

CC

VI-M


Pa) R


al LC

F$-

TEB

C-surface 1537degC

(2800degF)$-

Tbond coat 1482degC

(2700degF)$-

Tback C

MC

surface 1250degC

(2282degF)

ww

wnasagov

21


inistration

Advanced E

BC

-CM

C Fatigue Test w

ith CM

AS

and in Steam

Jet Tested 300 h D

urability in High H


-A

dvanced Hf-N

dYb silicate-N

dYbS

i bond coat EB

C coatings on 3D

architecture C

VI-P

IP S

iC-S

iC C

MC

(EB

-PV

D processing)



Surface view C

MA

S 35m

gcm2)

Back view

CM

AS

35mgcm

2)

ww

wnasagov


inistration

EBC

System

Designs ndash E

ffects of Com


Com

positions -

An alternating H

fO2 -and R


-PV


fO2 -layer


EB

-PV

D P

rocessed EB

Cs alternating H



CM

AS


ww

wnasagov


inistration

Sum

mary

bullC

MA

S degradation rem



iCSiC

CM

C com

ponent systems

bullC

MA

S leads to low



s with

accelerated EBC

and CM

C degradations

bullN

AS

A advanced E

BC com


e promise for C

MA

S





BC com

positions and EBC

-CM

AS


zirconium and rare



AS

resistance bull

Also standardize C

MA


MA



bullC


MA

S resistance w

hile maintaining


ww

wnasagov

24


inistration

Acknow

ledgements

bullThe w


ASA Fundam




r Michael H


ww

wnasagov

25


inistration

CM

AS

Reaction K

inetics in Bond C

oats ndash S


MA

S m

elts ndash R


ndash M


plemented for im

proved thermom

echanical ndash

CM



100hr

RE incorporations

CM

AS

resistance

ww

wnasagov

26




Bond Coats

-CM

AS

Reaction R


Selected E

BC

systems

ndashH

fO2 -R

E-S




ndashC

MA



fO2


659-AE9762

150

EBC

s

EBC

s

HfO

2 -Si (Si-rich)

Yb

2 Si 2 O 7

250658-EBC H

fO2-Rare Earth-A

lumino Silicate

660-Y2Si2O


b2Si2O7

Strength MPa


100681-H

fO2-Si

669-9762 with CM


693-HfO

2-Si with CM


5000

200 400

600 800

1000 1200

1400 1600

Temperature degC


Yb

2 Si2 O7 C

MA

S reacted tensile Y

b2 Si2 O

7 CM

AS reacted


surface w

ww

nasagov 27


inistration


MAS R


the Rare

Earth S

ilicon High M

elting Point C

oating Com

positions

ndashD

emonstrated C

MA

S resistance

of NAS

A R

E-Si S

ystem at

1500degC 100 hr

ndash S


Rare earth elem




ol)

CM

AS m

elts

Area A

Area B

ww

wnasagov

28


inistration

Advanced E

BC

-CM

C Fatigue Test w

ith CM

AS

and in Steam

Jet Tested 300 h D

urability in High H


-A

dvanced Hf-N

dYb silicate-N

dYbS

i bond coat EB

C coatings on 3D

architecture C

VI-P

IP S

iC-S

iC C

MC

(EB

-PV

D processing)



Surface view C

MA

S 35m

gcm2)

Back view

CM

AS

35mgcm

2)

ww

wnasagov


inistration

EBC

System

Designs ndash E

ffects of Com


Com

positions -

An alternating H

fO2 -and R


-PV


fO2 -layer


EB

-PV

D P

rocessed EB

Cs alternating H



CM

AS


ww

wnasagov


inistration

Sum

mary

bullC

MA

S degradation rem



iCSiC

CM

C com

ponent systems

bullC

MA

S leads to low



s with

accelerated EBC

and CM

C degradations

bullN

AS

A advanced E

BC com


e promise for C

MA

S





BC com

positions and EBC

-CM

AS


zirconium and rare



AS

resistance bull

Also standardize C

MA


MA



bullC


MA

S resistance w

hile maintaining


ww

wnasagov

24


inistration

Acknow

ledgements

bullThe w


ASA Fundam




r Michael H


ww

wnasagov

25


inistration

CM

AS

Reaction K

inetics in Bond C

oats ndash S


MA

S m

elts ndash R


ndash M


plemented for im

proved thermom

echanical ndash

CM



100hr

RE incorporations

CM

AS

resistance

ww

wnasagov

26




Bond Coats

-CM

AS

Reaction R


Selected E

BC

systems

ndashH

fO2 -R

E-S




ndashC

MA



fO2


659-AE9762

150

EBC

s

EBC

s

HfO

2 -Si (Si-rich)

Yb

2 Si 2 O 7

250658-EBC H

fO2-Rare Earth-A

lumino Silicate

660-Y2Si2O


b2Si2O7

Strength MPa


100681-H

fO2-Si

669-9762 with CM


693-HfO

2-Si with CM


5000

200 400

600 800

1000 1200

1400 1600

Temperature degC


Yb

2 Si2 O7 C

MA

S reacted tensile Y

b2 Si2 O

7 CM

AS reacted


surface w

ww

nasagov 27


inistration


MAS R


the Rare

Earth S

ilicon High M

elting Point C

oating Com

positions

ndashD

emonstrated C

MA

S resistance

of NAS

A R

E-Si S

ystem at

1500degC 100 hr

ndash S


Rare earth elem




ol)

CM

AS m

elts

Area A

Area B

ww

wnasagov

28


inistration

EBC

System

Designs ndash E

ffects of Com


Com

positions -

An alternating H

fO2 -and R


-PV


fO2 -layer


EB

-PV

D P

rocessed EB

Cs alternating H



CM

AS


ww

wnasagov


inistration

Sum

mary

bullC

MA

S degradation rem



iCSiC

CM

C com

ponent systems

bullC

MA

S leads to low



s with

accelerated EBC

and CM

C degradations

bullN

AS

A advanced E

BC com


e promise for C

MA

S





BC com

positions and EBC

-CM

AS


zirconium and rare



AS

resistance bull

Also standardize C

MA


MA



bullC


MA

S resistance w

hile maintaining


ww

wnasagov

24


inistration

Acknow

ledgements

bullThe w


ASA Fundam




r Michael H


ww

wnasagov

25


inistration

CM

AS

Reaction K

inetics in Bond C

oats ndash S


MA

S m

elts ndash R


ndash M


plemented for im

proved thermom

echanical ndash

CM



100hr

RE incorporations

CM

AS

resistance

ww

wnasagov

26




Bond Coats

-CM

AS

Reaction R


Selected E

BC

systems

ndashH

fO2 -R

E-S




ndashC

MA



fO2


659-AE9762

150

EBC

s

EBC

s

HfO

2 -Si (Si-rich)

Yb

2 Si 2 O 7

250658-EBC H

fO2-Rare Earth-A

lumino Silicate

660-Y2Si2O


b2Si2O7

Strength MPa


100681-H

fO2-Si

669-9762 with CM


693-HfO

2-Si with CM


5000

200 400

600 800

1000 1200

1400 1600

Temperature degC


Yb

2 Si2 O7 C

MA

S reacted tensile Y

b2 Si2 O

7 CM

AS reacted


surface w

ww

nasagov 27


inistration


MAS R


the Rare

Earth S

ilicon High M

elting Point C

oating Com

positions

ndashD

emonstrated C

MA

S resistance

of NAS

A R

E-Si S

ystem at

1500degC 100 hr

ndash S


Rare earth elem




ol)

CM

AS m

elts

Area A

Area B

ww

wnasagov

28


inistration

Sum

mary

bullC

MA

S degradation rem



iCSiC

CM

C com

ponent systems

bullC

MA

S leads to low



s with

accelerated EBC

and CM

C degradations

bullN

AS

A advanced E

BC com


e promise for C

MA

S





BC com

positions and EBC

-CM

AS


zirconium and rare



AS

resistance bull

Also standardize C

MA


MA



bullC


MA

S resistance w

hile maintaining


ww

wnasagov

24


inistration

Acknow

ledgements

bullThe w


ASA Fundam




r Michael H


ww

wnasagov

25


inistration

CM

AS

Reaction K

inetics in Bond C

oats ndash S


MA

S m

elts ndash R


ndash M


plemented for im

proved thermom

echanical ndash

CM



100hr

RE incorporations

CM

AS

resistance

ww

wnasagov

26




Bond Coats

-CM

AS

Reaction R


Selected E

BC

systems

ndashH

fO2 -R

E-S




ndashC

MA



fO2


659-AE9762

150

EBC

s

EBC

s

HfO

2 -Si (Si-rich)

Yb

2 Si 2 O 7

250658-EBC H

fO2-Rare Earth-A

lumino Silicate

660-Y2Si2O


b2Si2O7

Strength MPa


100681-H

fO2-Si

669-9762 with CM


693-HfO

2-Si with CM


5000

200 400

600 800

1000 1200

1400 1600

Temperature degC


Yb

2 Si2 O7 C

MA

S reacted tensile Y

b2 Si2 O

7 CM

AS reacted


surface w

ww

nasagov 27


inistration


MAS R


the Rare

Earth S

ilicon High M

elting Point C

oating Com

positions

ndashD

emonstrated C

MA

S resistance

of NAS

A R

E-Si S

ystem at

1500degC 100 hr

ndash S


Rare earth elem




ol)

CM

AS m

elts

Area A

Area B

ww

wnasagov

28


inistration

Acknow

ledgements

bullThe w


ASA Fundam




r Michael H


ww

wnasagov

25


inistration

CM

AS

Reaction K

inetics in Bond C

oats ndash S


MA

S m

elts ndash R


ndash M


plemented for im

proved thermom

echanical ndash

CM



100hr

RE incorporations

CM

AS

resistance

ww

wnasagov

26




Bond Coats

-CM

AS

Reaction R


Selected E

BC

systems

ndashH

fO2 -R

E-S




ndashC

MA



fO2


659-AE9762

150

EBC

s

EBC

s

HfO

2 -Si (Si-rich)

Yb

2 Si 2 O 7

250658-EBC H

fO2-Rare Earth-A

lumino Silicate

660-Y2Si2O


b2Si2O7

Strength MPa


100681-H

fO2-Si

669-9762 with CM


693-HfO

2-Si with CM


5000

200 400

600 800

1000 1200

1400 1600

Temperature degC


Yb

2 Si2 O7 C

MA

S reacted tensile Y

b2 Si2 O

7 CM

AS reacted


surface w

ww

nasagov 27


inistration


MAS R


the Rare

Earth S

ilicon High M

elting Point C

oating Com

positions

ndashD

emonstrated C

MA

S resistance

of NAS

A R

E-Si S

ystem at

1500degC 100 hr

ndash S


Rare earth elem




ol)

CM

AS m

elts

Area A

Area B

ww

wnasagov

28


inistration

CM

AS

Reaction K

inetics in Bond C

oats ndash S


MA

S m

elts ndash R


ndash M


plemented for im

proved thermom

echanical ndash

CM



100hr

RE incorporations

CM

AS

resistance

ww

wnasagov

26




Bond Coats

-CM

AS

Reaction R


Selected E

BC

systems

ndashH

fO2 -R

E-S




ndashC

MA



fO2


659-AE9762

150

EBC

s

EBC

s

HfO

2 -Si (Si-rich)

Yb

2 Si 2 O 7

250658-EBC H

fO2-Rare Earth-A

lumino Silicate

660-Y2Si2O


b2Si2O7

Strength MPa


100681-H

fO2-Si

669-9762 with CM


693-HfO

2-Si with CM


5000

200 400

600 800

1000 1200

1400 1600

Temperature degC


Yb

2 Si2 O7 C

MA

S reacted tensile Y

b2 Si2 O

7 CM

AS reacted


surface w

ww

nasagov 27


inistration


MAS R


the Rare

Earth S

ilicon High M

elting Point C

oating Com

positions

ndashD

emonstrated C

MA

S resistance

of NAS

A R

E-Si S

ystem at

1500degC 100 hr

ndash S


Rare earth elem




ol)

CM

AS m

elts

Area A

Area B

ww

wnasagov

28




Bond Coats

-CM

AS

Reaction R


Selected E

BC

systems

ndashH

fO2 -R

E-S




ndashC

MA



fO2


659-AE9762

150

EBC

s

EBC

s

HfO

2 -Si (Si-rich)

Yb

2 Si 2 O 7

250658-EBC H

fO2-Rare Earth-A

lumino Silicate

660-Y2Si2O


b2Si2O7

Strength MPa


100681-H

fO2-Si

669-9762 with CM


693-HfO

2-Si with CM


5000

200 400

600 800

1000 1200

1400 1600

Temperature degC


Yb

2 Si2 O7 C

MA

S reacted tensile Y

b2 Si2 O

7 CM

AS reacted


surface w

ww

nasagov 27


inistration


MAS R


the Rare

Earth S

ilicon High M

elting Point C

oating Com

positions

ndashD

emonstrated C

MA

S resistance

of NAS

A R

E-Si S

ystem at

1500degC 100 hr

ndash S


Rare earth elem




ol)

CM

AS m

elts

Area A

Area B

ww

wnasagov

28


inistration


MAS R


the Rare

Earth S

ilicon High M

elting Point C

oating Com

positions

ndashD

emonstrated C

MA

S resistance

of NAS

A R

E-Si S

ystem at

1500degC 100 hr

ndash S


Rare earth elem




ol)

CM

AS m

elts

Area A

Area B

ww

wnasagov

28

Hurst, Bernadette J. Puleo€¦ · G57, 40.00 mg CMAS SiO Wellman -Aygun Smialek Braue 0 49 mole%;...

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Transcript of Hurst, Bernadette J. Puleo€¦ · G57, 40.00 mg CMAS SiO Wellman -Aygun Smialek Braue 0 49 mole%;...