Calculation of phase diagrams of ternary M-Ga-Sb (M = In,Al) systems by convex hull approach

The ternary semiconductor phase diagrams of M-Ga-Sb (M = In, Al) are calculated by means of the convex hull approach. The software package TernAPI is tested as an effective tool for these purposes. The new facilities and advantages of this package are proven. It enables one to construct ternary phase diagrams based on thermodynamic properties of all phases existing in systems. The changes in phase region shapes and phase transformations with temperature can be studied by means of the TernAPI package. Selection of reliable thermodynamic models of solutions is of crucial importance for correct calculations of phase equilibria. It is shown that an adequate phase diagram can be constructed when a polynomial model of liquid solutions in the Al-Ga-Sb system is used.