Thermodynamic assessment of Cu–Eu and Cu–Yb system

The Cu–Eu and Cu–Yb binary systems have been assessed with CALPHAD method. Liquid, BCC and FCC phases are treated as substitutional solution phases, of which the excess Gibbs energies are modeled by Redlich–Kister polynomial functions. The binary intermetallic compounds are treated as stoichiometric phases. Thermodynamic parameters of various phases have been optimized and the calculated results are in agreement with experimental data.