Thermodynamic assessment of the Sm–Zn binary system

On the basis of available experimental data of phase diagram and thermodynamic properties, the Sm–Zn binary system has been optimized using the CALPHAD method. The solution phases, liquid, bcc, hcp and rhombohedral, were treated as by substitutional solutions models, while the intermediate compounds, SmZn, SmZn2, SmZn3, Sm3Zn11, Sm13Zn58, Sm3Zn22, Sm2Zn17 and SmZn11, were described as stoichiometric phases. A set of self-consistent parameters capable of formulating the Gibbs energies of various phases in this binary system has obtained. Calculation based on these parameters can reproduce most of the experimental data on thermochemistry and phase diagram reported in the literatures very well are satisfactory reproduced.