Thermodynamic calculations of the Au-Sc and Fe-Sc systems

Thermodynamic optimization of the Au-Sc and Fe-Sc systems was carried out by means of the CALPHAD (CALculation of PHAse Diagram) method on the basis of the available experimental data in literature. Redlich-Kister polynomials were used to describe the excess Gibbs energy of solution phases, and all the compounds are treated as stoichiometric ones. The Au-Sc system was described thermodynamically for the first time, and the Fe-Sc system was re-optimized by considering the new experimental data about enthalpies of mixing of the liquid phase. A set of self-consistent parameters was obtained for each of these two binary systems, respectively.