Phase Equilibria in Ni-P-Sn C. Schmetterer, J. Vizdal, H. Flandorfer and H. Ipser Department of...
-
date post
21-Dec-2015 -
Category
Documents
-
view
224 -
download
2
Transcript of Phase Equilibria in Ni-P-Sn C. Schmetterer, J. Vizdal, H. Flandorfer and H. Ipser Department of...
![Page 1: Phase Equilibria in Ni-P-Sn C. Schmetterer, J. Vizdal, H. Flandorfer and H. Ipser Department of Inorganic Chemistry – Materials Chemistry University of.](https://reader036.fdocuments.us/reader036/viewer/2022081519/56649d5e5503460f94a3d156/html5/thumbnails/1.jpg)
Phase Equilibria in Ni-P-SnPhase Equilibria in Ni-P-SnC. Schmetterer, J. Vizdal, H. Flandorfer
and H. Ipser
Department of Inorganic Chemistry – Materials Chemistry
University of Vienna
COST 531 Final Meeting, Vienna, May 2007
![Page 2: Phase Equilibria in Ni-P-Sn C. Schmetterer, J. Vizdal, H. Flandorfer and H. Ipser Department of Inorganic Chemistry – Materials Chemistry University of.](https://reader036.fdocuments.us/reader036/viewer/2022081519/56649d5e5503460f94a3d156/html5/thumbnails/2.jpg)
Technological BackgroundTechnological Background
Ni(P) layers as a contact material:
Protective Ni-layer on Cu substrate
in fact: amorphous Ni(P) layers; P is impurity!
Interaction with Sn-based solders?basic information from phase diagram
ternary phase diagram - and parts of the binaries! - have not yet been investigated
![Page 3: Phase Equilibria in Ni-P-Sn C. Schmetterer, J. Vizdal, H. Flandorfer and H. Ipser Department of Inorganic Chemistry – Materials Chemistry University of.](https://reader036.fdocuments.us/reader036/viewer/2022081519/56649d5e5503460f94a3d156/html5/thumbnails/3.jpg)
A ssessed N i-Sn phase diagram.
P. Nash and A. Nash, Bull. Alloy Phase Diagrams, 6 (4) (1985) p. 350-358
Ni-Sn Phase Diagram
Binary ConstituentsBinary Constituents
C. Schmetterer et al., accepted for publication in Intermetallics
![Page 4: Phase Equilibria in Ni-P-Sn C. Schmetterer, J. Vizdal, H. Flandorfer and H. Ipser Department of Inorganic Chemistry – Materials Chemistry University of.](https://reader036.fdocuments.us/reader036/viewer/2022081519/56649d5e5503460f94a3d156/html5/thumbnails/4.jpg)
Ni-Sn DetailsNi-Sn Details
NiNi33Sn phase transitionSn phase transition NiNi33SnSn22 phase transition phase transition
![Page 5: Phase Equilibria in Ni-P-Sn C. Schmetterer, J. Vizdal, H. Flandorfer and H. Ipser Department of Inorganic Chemistry – Materials Chemistry University of.](https://reader036.fdocuments.us/reader036/viewer/2022081519/56649d5e5503460f94a3d156/html5/thumbnails/5.jpg)
Ni-P and P-SnNi-P and P-Sn
• both systems are currently under investigation• experimental + CALPHAD
A ssessed N i-P phase diagram. Sn-P phase diagram.
![Page 6: Phase Equilibria in Ni-P-Sn C. Schmetterer, J. Vizdal, H. Flandorfer and H. Ipser Department of Inorganic Chemistry – Materials Chemistry University of.](https://reader036.fdocuments.us/reader036/viewer/2022081519/56649d5e5503460f94a3d156/html5/thumbnails/6.jpg)
• from powders of binary end members (e.g. Ni3Sn) and red P, and Sn
many problems!- embrittlement of quartz capsules- explosion of capsules • samples contained in alumina crucibles
• alloyed in evacuated quartz tubes employing very slow heating, especially at P > 40 at.%
• annealed at 200, 550, 700,850 and 1050 °C
Sample PreparationSample Preparation
Ni2P
Ni3SnNi3Sn2
![Page 7: Phase Equilibria in Ni-P-Sn C. Schmetterer, J. Vizdal, H. Flandorfer and H. Ipser Department of Inorganic Chemistry – Materials Chemistry University of.](https://reader036.fdocuments.us/reader036/viewer/2022081519/56649d5e5503460f94a3d156/html5/thumbnails/7.jpg)
InvestigationsInvestigationsIn Vienna:
• DTA – not yet fully interpreted
• XRD – isothermal sections
Short Term Scientific MissionShort Term Scientific Missionhost: A. Kodentsov, TUehost: A. Kodentsov, TUe
• Light microscopy + polarized light
• SEM / EDS
• diffusion couples
![Page 8: Phase Equilibria in Ni-P-Sn C. Schmetterer, J. Vizdal, H. Flandorfer and H. Ipser Department of Inorganic Chemistry – Materials Chemistry University of.](https://reader036.fdocuments.us/reader036/viewer/2022081519/56649d5e5503460f94a3d156/html5/thumbnails/8.jpg)
Phase relations at 550 °CPhase relations at 550 °C
Pseudo-binarySystem Ni2P – Sn?
Ternary phases: Ni2PSn Ni10P3Sn Ni10P3Sn5
Ni10P3Sn8
T4 – new phase?
![Page 9: Phase Equilibria in Ni-P-Sn C. Schmetterer, J. Vizdal, H. Flandorfer and H. Ipser Department of Inorganic Chemistry – Materials Chemistry University of.](https://reader036.fdocuments.us/reader036/viewer/2022081519/56649d5e5503460f94a3d156/html5/thumbnails/9.jpg)
Phase relations at 700 °CPhase relations at 700 °C
![Page 10: Phase Equilibria in Ni-P-Sn C. Schmetterer, J. Vizdal, H. Flandorfer and H. Ipser Department of Inorganic Chemistry – Materials Chemistry University of.](https://reader036.fdocuments.us/reader036/viewer/2022081519/56649d5e5503460f94a3d156/html5/thumbnails/10.jpg)
Phase relations at 850 °CPhase relations at 850 °C
![Page 11: Phase Equilibria in Ni-P-Sn C. Schmetterer, J. Vizdal, H. Flandorfer and H. Ipser Department of Inorganic Chemistry – Materials Chemistry University of.](https://reader036.fdocuments.us/reader036/viewer/2022081519/56649d5e5503460f94a3d156/html5/thumbnails/11.jpg)
Diffusion CouplesDiffusion Couples
![Page 12: Phase Equilibria in Ni-P-Sn C. Schmetterer, J. Vizdal, H. Flandorfer and H. Ipser Department of Inorganic Chemistry – Materials Chemistry University of.](https://reader036.fdocuments.us/reader036/viewer/2022081519/56649d5e5503460f94a3d156/html5/thumbnails/12.jpg)
Diffusion CouplesDiffusion CouplesNi3Sn / Ni2P
Annealed at 700 °C in vacuum for 100 h
Ni3SnNi3Sn
Ni3 S
n2
Ni3Sn2
??
Ni12P5Ni12P5
Ni2PNi2P
100 µm
![Page 13: Phase Equilibria in Ni-P-Sn C. Schmetterer, J. Vizdal, H. Flandorfer and H. Ipser Department of Inorganic Chemistry – Materials Chemistry University of.](https://reader036.fdocuments.us/reader036/viewer/2022081519/56649d5e5503460f94a3d156/html5/thumbnails/13.jpg)
Diffusion CouplesDiffusion CouplesSn / Ni2P
Annealed at 200 °C in vacuum for 4 months
SnNi2P
Ni2PSn
![Page 14: Phase Equilibria in Ni-P-Sn C. Schmetterer, J. Vizdal, H. Flandorfer and H. Ipser Department of Inorganic Chemistry – Materials Chemistry University of.](https://reader036.fdocuments.us/reader036/viewer/2022081519/56649d5e5503460f94a3d156/html5/thumbnails/14.jpg)
Conclusion and OutlookConclusion and OutlookNi-P-Sn:
• first information on phase equilibria
• diffusion couples
Planned investigations:
• continue the phase diagram study
• Calorimetry – enthalpy of mixing, enthalpy of formation
CALPHAD study of the system
![Page 15: Phase Equilibria in Ni-P-Sn C. Schmetterer, J. Vizdal, H. Flandorfer and H. Ipser Department of Inorganic Chemistry – Materials Chemistry University of.](https://reader036.fdocuments.us/reader036/viewer/2022081519/56649d5e5503460f94a3d156/html5/thumbnails/15.jpg)
AcknowledgementsAcknowledgements
K. Richter, U. Saeed
A. Kodentsov (TU Eindhoven, NL)
H. Schmidt (Dep. f. Physical Chemistry)P. Roussel (Ecole Nationale Superieure de Lille)A. Leineweber (MPI Stuttgart)
Thanks to:
FWF P-16495-N11, COST 531, ELFNET
Thank You for Your Attention