Kurt LeinenweberKurt Leinenweber – Arizona State University – Arizona State University COMPRES Annual Meeting 2004 – Lake Tahoe, CA ~ June 21, 2004COMPRES Annual Meeting 2004 – Lake Tahoe, CA ~ June 21, 2004

Page Page 11

COMPRES Multi-anvil cell COMPRES Multi-anvil cell assembly developmentassembly development

Kurt Leinenweber, James Tyburczy (Arizona State University)

Kurt LeinenweberKurt Leinenweber – Arizona State University – Arizona State University COMPRES Annual Meeting 2004 – Lake Tahoe, CA ~ June 21, 2004COMPRES Annual Meeting 2004 – Lake Tahoe, CA ~ June 21, 2004

Page Page 22

Some collaborators:Some collaborators:

» Caltech (Jed Mosenfelder) 14/8, 8/3 (requested)

» Case Western (Jim Van Orman) 8/3

» Canberra (Tom Sharp) 8/3

» American Museum of Natural History (Rondi Davies) 8/3

» Urbana Champaign (Jie Li) 8/3

» Carnegie (Yingwei Fei, Shantanu Keshav and Alexandre Corgne) 8/3

» Stony Brook (Jiuhua Chen) 6 mm mullite cubes on order; 8/3 request; 8 mm mullite cut

Kurt LeinenweberKurt Leinenweber – Arizona State University – Arizona State University COMPRES Annual Meeting 2004 – Lake Tahoe, CA ~ June 21, 2004COMPRES Annual Meeting 2004 – Lake Tahoe, CA ~ June 21, 2004

Page Page 33

Some more collaborators:Some more collaborators:» Daresbury (David Price, Ray Jones, Ed Bailey). In-

situ calibration of “hybrid” assemblies

» Argonne (Yanbin Wang) In-situ calibration of “opaque” assemblies.

(At ASU: development of 8/3, 10/5, 14/8 assemblies)

Kurt LeinenweberKurt Leinenweber – Arizona State University – Arizona State University COMPRES Annual Meeting 2004 – Lake Tahoe, CA ~ June 21, 2004COMPRES Annual Meeting 2004 – Lake Tahoe, CA ~ June 21, 2004

Page Page 44

Design considerationsDesign considerationsTry to achieve:

1. High precision.

2. High success rates.

3. Low cost, ready availability.

4. Consistency between laboratories.

5. Consistency over time.

The best developments are those that have many or all of these characteristics at once.

Kurt LeinenweberKurt Leinenweber – Arizona State University – Arizona State University COMPRES Annual Meeting 2004 – Lake Tahoe, CA ~ June 21, 2004COMPRES Annual Meeting 2004 – Lake Tahoe, CA ~ June 21, 2004

Page Page 55

Steps to increase precisionSteps to increase precision» Think about all the variables that could affect the

pressure.

» Eliminate them if possible.

Gasket placement could affect the pressure. Problem avoided by using pre-cut paper.

Kurt LeinenweberKurt Leinenweber – Arizona State University – Arizona State University COMPRES Annual Meeting 2004 – Lake Tahoe, CA ~ June 21, 2004COMPRES Annual Meeting 2004 – Lake Tahoe, CA ~ June 21, 2004

Page Page 66

Precision (cont.)Precision (cont.)

» Octahedron injection-molded.

» Rhenium furnace cut by EDM.

» LaCrO3 sleeve turned and slotted by lathe.

» Alumina inner pieces made on a dicing saw.

Kurt LeinenweberKurt Leinenweber – Arizona State University – Arizona State University COMPRES Annual Meeting 2004 – Lake Tahoe, CA ~ June 21, 2004COMPRES Annual Meeting 2004 – Lake Tahoe, CA ~ June 21, 2004

Page Page 77

Room Temperature Calibration of the Fei Assemblyusing tungsten EoS

y = -4.9130E-10x4 + 7.8670E-07x3 - 4.9144E-04x2 + 1.6335E-01x

R2 = 9.9518E-01

0

5

10

15

20

25

30

0 50 100 150 200 250 300 350 400 450 500

Oil Pressure (US tons)

Sam

ple

Pre

ssu

re (

GP

a)

T0520

T0522

T0524

Series4

Poly. (Series4)

Kurt LeinenweberKurt Leinenweber – Arizona State University – Arizona State University COMPRES Annual Meeting 2004 – Lake Tahoe, CA ~ June 21, 2004COMPRES Annual Meeting 2004 – Lake Tahoe, CA ~ June 21, 2004

Page Page 88

Steps to increase success ratesSteps to increase success rates

» Obtain a more exact description of popular “lore”.

» Keep track of success rates for different configurations - change them if the success rate could be higher.

» Also: good fit of octahedron and gaskets; use of “nesting plates.”

Pre-slotted octahedron (new)

Kurt LeinenweberKurt Leinenweber – Arizona State University – Arizona State University COMPRES Annual Meeting 2004 – Lake Tahoe, CA ~ June 21, 2004COMPRES Annual Meeting 2004 – Lake Tahoe, CA ~ June 21, 2004

Page Page 99

New pressure mediaNew pressure mediaInjection-molded octahedra (MgO/spinel). Also: mullite cubes are being made for the DIA.

Kurt LeinenweberKurt Leinenweber – Arizona State University – Arizona State University COMPRES Annual Meeting 2004 – Lake Tahoe, CA ~ June 21, 2004COMPRES Annual Meeting 2004 – Lake Tahoe, CA ~ June 21, 2004

Page Page 1010

Automated latheAutomated lathe

Slotting a lanthanum chromite sleeve

Lathe (note the hood attachment!)

Kurt LeinenweberKurt Leinenweber – Arizona State University – Arizona State University COMPRES Annual Meeting 2004 – Lake Tahoe, CA ~ June 21, 2004COMPRES Annual Meeting 2004 – Lake Tahoe, CA ~ June 21, 2004

Page Page 1111

Gaskets!Gaskets!» The current rate-limiting

step for this project!

» We are improving our automated milling, and testing laser-cutting. The best technique will depend on the size (smaller gaskets: laser. Larger gaskets: milling).

Kurt LeinenweberKurt Leinenweber – Arizona State University – Arizona State University COMPRES Annual Meeting 2004 – Lake Tahoe, CA ~ June 21, 2004COMPRES Annual Meeting 2004 – Lake Tahoe, CA ~ June 21, 2004

Page Page 1212

Consistency between laboratoriesConsistency between laboratories

Strain cubeStrain cube

Kurt LeinenweberKurt Leinenweber – Arizona State University – Arizona State University COMPRES Annual Meeting 2004 – Lake Tahoe, CA ~ June 21, 2004COMPRES Annual Meeting 2004 – Lake Tahoe, CA ~ June 21, 2004

Page Page 1313

0

2

4

6

8

10

12

14

16

0 100 200 300 400 500 600 700 800

Force (Tons)

Pre

ssur

e (G

Pa)

Bi I-II

Bi II-III

Coesite-stishovite1200 °C

Mg2SiO4

1200 °C

CaGeO3 Gt-Pv1200 °C

14/8 Calibration on Caltech 1000-ton pressInjection-molded octahedra, 4.5 x 2.8 mm gaskets, laser-cut cardboard backups

dashed line is japanese 14/8 calibration

MgO

W

In-situ data, 1200 °C:

Kurt LeinenweberKurt Leinenweber – Arizona State University – Arizona State University COMPRES Annual Meeting 2004 – Lake Tahoe, CA ~ June 21, 2004COMPRES Annual Meeting 2004 – Lake Tahoe, CA ~ June 21, 2004

Page Page 1414

Consistency over timeConsistency over time

Document the sources of materials, and their properties (composition, density, dimensions, etc.). Beware of

products that may be discontinued!

Kurt LeinenweberKurt Leinenweber – Arizona State University – Arizona State University COMPRES Annual Meeting 2004 – Lake Tahoe, CA ~ June 21, 2004COMPRES Annual Meeting 2004 – Lake Tahoe, CA ~ June 21, 2004

Page Page 1515

Upcoming developments:Upcoming developments:» Develop 10/5, 18/11, and 25/15 COMPRES

assemblies.

» New 14/8: “zero thermal gradient, x-ray transparent” assembly with smaller pressure loss at very high T.

» New ceramics: In hand: forsterite insulation, spinel insulation, TiB2/BN machinable composite furnace, mullite pressure medium. In development or proposed: TiO2 insulation, SiC furnace.

» (Also could use: a better pressure standard for temperatures above 1200 - 1400 °C).

Kurt LeinenweberKurt Leinenweber – Arizona State University – Arizona State University COMPRES Annual Meeting 2004 – Lake Tahoe, CA ~ June 21, 2004COMPRES Annual Meeting 2004 – Lake Tahoe, CA ~ June 21, 2004

Page Page 1616

Upcoming plans:Upcoming plans:» Hands-on training course at Argonne (joint between

this project and Y. Wang). (not during Sept shutdown or Dec/Jan holidays at Argonne).

» Cell design “summit meeting” in Arizona?

» Continued collaborations, developments, and data gathering with the COMPRES assemblies.