Thermodynamic assessment of the Fe–Er system

The Fe–Er binary system has been assessed by combining CALPHAD method with Miedema approach. Liquid is treated as a substitutional solution phase, of which the excess Gibbs energies are modeled by a Redlich–Kister polynomial function. The binary intermetallic compounds are treated as stoichiometric phases. Thermodynamic parameters of various phases have been optimized and the calculated results are in reasonable agreement with experimental data.