A Study in Phase Equilibria in the Cr-Mo-Ni System

Abstract

A thermodynamic evaluation of the Cr-Mo-Ni system has been performed using a computerized optimization procedure . Parameters describing the Gibbs energy of the various phases have been calculated. The intermetallic phases delta, P and sigma were included in the calculations, using a three-sublattice model. Any phase equilibria can be recalculated from the set of parameters that has been determined, and calculated isothermal sections are compared with experimental data from different sources. A few measurements were made at 1373 K in the present work, to supplement previous experimental results . The experimental data used for the optimization, i.e. data at 1523 K and 1373 K, are well described by the present calculations, but also calculations at other temperatures are in many cases in good agreement with the experimental data.