A computational thermodynamic model of the Mg–Al–Ge system

Abstract

The Mg–Al–Ge system has been thermodynamically modeled by combining thermodynamic description of the three constituent binary systems and using a ternary interaction parameter for the liquid phase. Among the three binary systems, Mg–Ge and Al–Ge systems are optimized in this study, whereas the optimized thermodynamic parameters for the Al–Mg system are taken from COST 507 database. The binary excess energy terms are described using Redlich–Kister polynomial model. The ternary invariant points are predicted from the thermodynamic model. The Mg–Al–Ge phase diagram has been modeled for the first time in this work and found to be consistent with the experimental results available in the literature.