Phase equilibria of Sn-Sb-Cu system

Ternary Sn-Sb-Cu alloys are prepared. The primary solidification phases, the phase transformation temperatures, and the equilibrium phases at 250 °C are experimentally determined. The liquidus projection and the 250 °C phase equilibria isothermal section of the Sn-Sb-Cu system are proposed based on the experimental results and the phase diagrams of the three constituent binary systems. Using the CALPHAD approach, thermodynamic modeling of the Sn-Sb-Cu ternary system is carried out based on the experimental information determined in this study and those in the literatures, together with the developed thermodynamic models of the three constituent binary systems. The liquidus projection and the isothermal sections are then calculated using the models developed in this study and the results are in good agreement with experimental determinations.