Thermodynamic reassessment of the Sm–Ni binary system

Abstract Based on the available experimental data of phase equilibria and thermodynamic properties from the literature, the Sm–Ni binary system has been thermodynamically assessed using the CALPHAD (CALculation of PHAse Diagrams) method. The solution phases, Liquid, FCC_A1, RHOMB, HCP_A3 and BCC_A2, were modeled as substitutional solution phases, of which the excess Gibbs energies were formulated with Redlich–Kister polynomials. All intermetallic phases Sm 3 Ni, Sm 7 Ni 3 , Sm 3 Ni 2 , SmNi, SmNi 2 , SmNi 3 , Sm 2 Ni 7 , Sm 5 Ni 19 , SmNi 5 , and Sm 2 Ni 17 were described as stoichiometric compounds. Subsequently, a set of self-consistent thermodynamic parameters describing various phases in this binary system has been obtained. The calculated results reproduce well the corresponding experimental data.