Critical thermodynamic evaluation and optimization of the Co–Nd, Cu–Nd and Nd–Ni systems

All experimental data on phase equilibria and thermodynamic properties of the Co–Nd, Cu–Nd and Nd–Ni binary systems in literature were reviewed and critically examined. A set of optimized model parameters for all solid stoichiometric compounds and liquid phase was built to reproduce all available reliable thermodynamic properties and phase diagram data within experimental error limits. The Modified Quasichemical Model in the pair approximation was used to describe the thermodynamic properties of the liquid solution accurately. Systematic changes in the phase diagrams and thermodynamic properties between Nd–X binary systems, where X=Mn, Fe, Co, Ni and Cu, are presented and discussed.

► All available data for the Co–Nd, Cu–Nd and Nd–Ni systems were critically evaluated.
► thermodynamic database of optimized model parameters has been developed.
► Gibbs energies of solid and liquid phases were properly described.
► All reliable thermodynamic and phase diagram data were properly reproduced.
► The trend in binary Nd–X systems (X=Mn, Fe, Co, Ni, Cu) is presented.