Critical assessment and thermodynamic modeling of Mg–Zn, Mg–Sn, Sn–Zn and Mg–Sn–Zn systems

All available thermodynamic and phase diagram data of Mg–Zn, Mg–Sn and Sn–Zn are critically evaluated and most reliable data are incorporated to model each system. The binary liquid phases are modeled using the modified quasi-chemical model in order to incorporate the strong ordering in the Mg–Sn and Mg–Zn systems. The binaries are extrapolated to construct the Mg–Sn–Zn ternary using the symmetric Kohler geometric model without using any ternary interaction parameter. The calculated Mg–Sn–Zn ternary diagram shows very good consistency with the published experimental data. ► Mg–Zn, Mg–Sn and Sn–Zn binary systems are thermodynamically modeled. ► The binary liquid phases are modeled using the modified quasi-chemical model. ► The binaries are extrapolated to construct the Mg–Sn–Zn ternary. ► No ternary parameter is used to construct the ternary. ► The calculated Mg–Sn–Zn diagram shows very good consistency with experimental data.