Thermodynamic reassessment of Gd–Ni system

By means of CALPHAD (CALculation of PHAse Diagrams) approach, the phase diagram and thermodynamic data of the Gd–Ni system were critically assessed. The Gd–Ni system contains four solution phases (liquid, face-centered cubic FCC_A1, body-centered cubic BCC_A2 and hexagonal close-packed HCP_A3) modeled with the Redlich-Kister polynomials and seven intermetallic compounds Gd3Ni, GdNi, GdNi2, GdNi3, Gd2Ni7, GdNi5 and Gd2Ni17, which are all treated as stoichiometric compounds. A set of self-consistent thermodynamic parameters describing various phases in this binary system was obtained. The phase diagram and thermodynamic quantities calculated from assessed parameters agree well with experimental data.