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Phase Diagrams & Computational Thermodynamics

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Ag-Cu-Sn System


Calculated Liquidus Projection

Liquidus Projection with Isotherms of the Ag-Cu-Sn System (109 KB)

Sn-rich Part

Sn-rich Region of Ag-Cu-Sn Liquidus Projection (156 KB)


Status of the thermodynamic description:

Ternary liquid adjusted to reproduce the eutectic
L ->Ag3Sn + Cu6Sn5 + (Sn)
U.R. Kattner, NIST, 2000
 

Sources of the binary descriptions:

Ag-Cu: F.H. Hayes, H.L. Lukas, G. Effenberg and G.Petzow, Z. Metallkde. 77 (1986) 749-754

Ag-Sn: C.-S. Oh, J.-H. Shim, B.-J. Lee and D.N. Lee, J. Alloys and Compounds 238 (1996) 155-166

Cu-Sn: J.H. Shim, C.-S. Oh, B.-J. Lee and D.N. Lee, Z. Metallkde. 87 (1996) 205-212


Calculated Invariant Equilibria

Reaction Phase Mass % Ag Mass % Cu Mass % Sn
L   +   beta   ->   (Cu)   +   gamma

641.6 oC

Liquid 40.11 35.76 24.13
beta 0 75.74 24.26
(Cu) 2.39 80.37 17.24
gamma 0 73.57 26.43
L   +   (Cu)   ->   (Ag)   +   gamma

636.4 oC

Liquid 44.42 32.17 23.41
(Cu) 2.40 80.42 17.18
(Ag) 88.24 2.71 9.05
gamma 0 73.49 26.51
L   ->   gamma   +   Cu10Sn3   +   Cu3Sn

550.1 oC

Liquid 73.13 8.50 18.36
gamma 0 69.97 30.03
Cu10Sn3 0 64.06 35.94
Cu3Sn 0 61.63 38.37
L   +   (Ag)   +   gamma   ->   Cu10Sn3

612.6 oC

Liquid 49.64 22.85 27.51
(Ag) 86.29 1.93 11.78
gamma 0 67.58 32.42
Cu10Sn3 0 64.06 35.94
L   +   (Ag)   +   Cu10Sn3   ->   Cu3Sn

611.0 oC

Liquid 50.17 22.06 27.77
(Ag) 86.14 1.88 11.98
Cu10Sn3 0 64.06 35.94
Cu3Sn 0 61.63 38.37
L   +   (Ag)   ->   (zeta Ag)   +   Cu3Sn

574.4 oC

Liquid 53.46 13.07 33.47
(Ag) 83.26 1.09 15.65
(zeta Ag) 82.75 0 17.25
Cu3Sn 0 61.63 38.37
L   +   (zeta Ag)   ->   Ag3Sn   +   Cu3Sn

459.0 oC

Liquid 38.77 8.54 52.69
(zeta Ag) 75.96 0 24.04
Ag3Sn 73.17 0 26.83
Cu3Sn 0 61.63 38.37
L   +   Cu3Sn   ->  Ag3Sn   +   Cu6Sn5

356.2 oC

Liquid 19.26 5.86 74.88
Cu3Sn 0 61.63 38.37
Ag3Sn 73.17 0 26.83
Cu6Sn5 0 39.07 60.93
L   ->   Ag3Sn   +   Cu6Sn5   +  (Sn)

215.9 oC

Liquid 3.73 0.85 95.42
Ag3Sn 73.17 0 26.83
Cu6Sn5 0 39.07 60.93
(Sn) 0.07 0 99.93


Phases, Crytal Structures and Model Descriptions

Phase Struktur-
bericht
Symbol
Common Names Prototype Spacegroup Model*
 
Liquid n/a L n/a n/a (Ag,Cu,Sn)1
 
Fcc A1 (Ag), (Cu) Cu Fm-3m (Ag,Cu,Sn)1(Va)1
Bcc A2 (beta Cu), beta W Im-3m (Cu,Sn)1(Va)3
Hcp A3 (zeta Ag), (epsilon Pb) Mg P63/mmc (Ag,Sn)1(Va)0.5
Bct A5 (Sn), (beta Sn) beta Sn I41/amd (Ag,Cu,Sn)1
 
Ag3Sn D0alpha epsilon beta Cu3Ti Pmmn (Ag)0.75(Sn)0.25
Cu3Sn.h D03 gamma BiF3 Fm-3m (Cu,Sn)0.75(Cu,Sn)0.25
Cu41Sn11 ... delta ... F-43m Cu0.788Sn0.212
Cu10Sn3 ... zeta ... P63 Cu0.769Sn0.231
Cu3Sn ... epsilon ... Cmcm Cu0.75Sn0.25
Cu6Sn5 B81 eta, Cu6Sn5.h NiAs P63/mmc Cu0.545Sn0.455
Cu6Sn5' ... eta ', Cu6Sn5.l ... ... Cu0.545Sn0.455

*Major species are printed bold face



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