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Phase Diagrams & Computational Thermodynamics

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Ag-Sn System

Calculated Phase Diagram

Calculated Ag-Sn Phase Diagram (percent of mass fraction) (97 KB)

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) 340-347
P.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-
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

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