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Phase Diagrams & Computational Thermodynamics

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Bi-Pb System

Calculated Phase Diagram

Calculated Bi-Pb Phase Diagram (percent of mass fraction) (87 KB)

Status of the thermodynamic description:

S.W. Yoon and H.M. Lee, CALPHAD 22 (1998) 167-178:
Full thermodynamic assessment.

Additional Assessments:

I.L. Aptekar and V.B. Baskakova, Dokl. Akad. Nauk SSSR 191 (1970) 1305-1308
B. Zimmermann, Ph.D. Thesis, Universität Stuttgart, 1976
P. Taskinen and O.Teppo, Scand. J. Metall. 21 (1992) 181-188

Calculated Invariant Equilibria

Reaction Phase Mass % Bi Mass % Pb
L   +   (Pb)   ->   (epsilon Pb)

185.0 oC

Liquid 36.07 63.93
(Pb) 23.27 76.73
(epsilon Pb) 27.94 72.06
L   ->   (epsilon Pb)   +   (Bi)

125.9 oC

Liquid 55.51 44.49
(epsilon Pb) 42.13 57.87
(Bi) 99.52 0.48

Phases, Crystal Structures and Model Descriptions

Phase Struktur-
Common Names Prototype Spacegroup Model*
Liquid n/a L n/a n/a (Bi,Pb)1
Fcc A1 (Pb) Cu Fm-3m (Bi,Pb)1(Va)1
Hcp A3 (epsilon Pb) Mg P63/mmc (Bi,Pb)1(Va)0.5
Rho A7 (Bi) alpha As R-3m (Bi)1

*Major species are printed bold face

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