Abstract
The thermodynamic modeling and optimization of Cd–Sb, Sb–Zn binary systems and the Cd–Sb–Zn ternary system were carried out by means of the CALPHAD (CALculation of the PHAse Diagram) technique. The solution phases (liquid, hexagonal closed packed) were modeled with the Redlich–Kister equation. The Sb 3Zn 4 phases at high temperature ( δ - Sb 3 Zn 4 and δ ′ - Sb 3 Zn 4 ), and Sb 2Zn 3 ones (two modifications: η and ξ ) were treated as stoichiometric compounds. Two two-sublattice models, (Sb)(Cd,Zn,V a) and (Sb) 3 (Cd,Zn,Va) 4 , were applied to describe the compounds ω - SbZn and ε - Sb 3 Zn 4 in the Cd–Sb–Zn system, respectively. A set of self-consistent thermodynamic descriptions of the Cd–Sb–Zn system were obtained.
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