Comparison between Sn-Ni-Zn liquid phase thermodynamic assessments performed by the CALPHAD method and by geometrical models

摘要

Estimation of the thermodynamic properties of the Sn-Ni-Zn systems has been performed using the general solution model and by other geometric models. Description of the ternary liquid phase (Gibbs excess energy dependence on the temperature and the composition) was achieved using the available thermodynamic data of the constitutive binary systems (Ni-Zn, Sn-Zn, Sn-Ni). The validity of the geometric models was checked. The calculations have been performed in a wide temperature range (1000-2000 K). The calculated quantities were compared with the available literature data. Good agreement of the present assessment with thermodynamically optimized values of the system Sn-Ni-Zn (obtained by the CALPHAD approach) was observed.