Phase equilibria of Sn-Sb-Cu system

► Primary solidification phases of Sn-Sb-Cu alloys are experimentally determined. ► Equilibrium phases of Sn-Sb-Cu alloys at 250 °C are experimentally determined. ► Liquidus projection and 250 °C isothermal section of Sn-Sb-Cu system are constructed. ► Thermodynamic modeling of Sn-Sb-Cu system is carried out using the CALPHAD approach. ► Calculated phase diagrams obtained in this study agree with experimental results.