Thermodynamic assessment of the Ce–Pt system

The thermodynamic assessment of the Ce–Pt binary system has been carried out by using the CALPHAD (Calculation of Phase Diagrams) method based on the available literature data including the phase equilibria and thermodynamic properties. The Gibbs free energies of the liquid, bcc_A2 and fcc_A1 phases were described by the subregular solution model with the Redlich–Kister formula, and those of the intermetallic compounds (Ce7Pt3, Ce3Pt2, Ce5Pt4, CePt, Ce3Pt4, CePtx and CePt5) in the Ce–Pt binary system were described by the sublattice model, and two intermetallic compounds (Ce5Pt3,CePt2) in the Ce–Pt binary system were described by the two-sublattice model. A consistent set of thermodynamic parameters leading to a reasonable agreement between the calculated results and literature data was obtained.

► The Ce–Pt binary system has been assessed by using the CALPHAD method.
► The intermetallic compounds which have homogeneity range were described by the two-sublattice model.
► The thermodynamic parameters of the Ce–Pt binary system were obtained.
► An agreement between the calculated results and experimental data was obtained for the binary system.