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Phase Diagrams & Computational Thermodynamics
Ag-Sn System
Calculated Phase Diagram
Status of the thermodynamic description:
C.-S. Oh, J.-H. Shim, B.-J. Lee and D.N. Lee, J. Alloys & Compds. 238 (1996) 155-166:Full thermodynamic assessment.
Additional Assessments:
I. Karakaya and W.T. Thompson, Bull. Alloy Phase Diagrams 8 (1987) 340-347P.Y. Chevalier, Thermochim. Acta, 136 (1988) 45-54
U.R. Kattner and W.J. Boettinger, J. Electron. Mater. 23 (1994) 603-610
Y. Xie and Z. Qiao, J. Phase Equilibria 17 (1996) 208-217
Calculated Invariant Equilibria
| Reaction | Phase | Mass % Ag | Mass % Sn |
|---|---|---|---|
| L + (Ag) -> (zeta Ag)
723.7 oC |
Liquid | 77.30 | 22.70 |
| (Ag) | 87.42 | 12.58 | |
| (zeta Ag) | 85.76 | 14.24 | |
| L + (zeta Ag) -> Ag3Sn
479.9 oC |
Liquid | 48.79 | 51.21 |
| (zeta Ag) | 74.39 | 25.61 | |
| Ag3Sn | 73.17 | 26.83 | |
| L -> Ag3Sn + (Sn)
220.3 oC |
Liquid | 3.73 | 96.27 |
| Ag3Sn | 73.17 | 26.83 | |
| (Sn) | 0.07 | 99.93 |
Phases, Crystal Structures and Model Descriptions
| Phase | Struktur- bericht Symbol |
Common Names | Prototype | Spacegroup | Model* |
|---|---|---|---|---|---|
| Liquid | n/a | L | n/a | n/a | (Ag,Sn)1 |
| Fcc | A1 | (Ag) | Cu | Fm-3m | (Ag,Sn)1(Va)1 |
| Hcp | A3 | (zeta Ag) | Mg | P63/mmc | (Ag,Sn)1(Va)0.5 |
| Bct | A5 | (Sn), (beta Sn) | beta Sn | I41/amd | (Ag,Sn)1 |
| Ag3Sn | D0alpha | epsilon | beta Cu3Ti | Pmmn | (Ag)0.75(Sn)0.25 |
*Major species are printed bold face