Thermodynamic description of the Au–Si–Sn system

The binary Au–Si and Si–Sn systems were reassessed using CALPHAD method on the basis of available experimental information of these two systems, where the solution phases were modeled as substitutional solution of which the excess Gibbs energies were formulated by a Redlich–Kister polynomial. Combined with the Au–Sn system recently optimized in our group, a thermodynamic description of the Au–Si–Sn ternary system was carried out to reproduce the available phase equilibria of this system. The liquidus projection and several vertical sections of the ternary system were calculated, which are in reasonable agreement with the reported data.