Thermodynamic modeling of the Fe–Mo–Zr system

Abstract Thermodynamic properties of the ternary Fe–Mo–Zr system have been analyzed by means of the calculation of phase diagrams method. Thermodynamic models have been defined to describe the Gibbs energy of the individual phases, and the model parameters have been optimized using constitutional data available from the literature. A two-sublattice model was used to describe wide homogeneity ranges of the ternary C14 and C15 Laves phases. A self-consistent thermodynamic description of the Fe–Mo–Zr system was obtained. The calculated phase equilibria are compared with experiments.