Thermodynamic analysis of stable and metastable equilibria in the Cu-Cr system

The available experimental information is not sufficient to determine the temperature dependence of excess Gibbs energy of the liquid Cu-Cr alloys. The previously optimized excess entropy of mixing of the liquid phase is too positive. A new set of optimized thermodynamic functions of the Cu-Cr system has been obtained from thermodynamic and phase diagram data incorporating the latest data. The Tanaka-Gokcen-Morita relationship was used to constraint the excess enthalpy and entropy coefficients of the liquid phase. The optimized thermodynamic functions can account very well for the process of precipitation in the supersaturated fcc Cu-Cr alloys.