Thermodynamic assessments of the Cu-B and Cu-Tm systems

By using the calculation of phase diagrams (CALPHAD) method, the thermodynamic assessments of the Cu-B and Cu-Tm systems were carried out based on the available experimental data including thermodynamic properties and phase equilibria. Gibbs free energies of the liquid, fcc and β rhombohedral phases in the Cu-B system and the liquid, fcc and hcp phases in the Cu-Tm system were modeled by the subregular solution model with the Redlich-Kister formula, and those of the intermetallic compounds (Cu5Tm, Cu9Tm2, Cu7Tm2, Cu2Tm and CuTm compound) in the Cu-Tm system were described by the sublattice model. An agreement between the present calculated results and experimental data was obtained.