THERMODYNAMIC ASSESSMENT OF THE AL-NI SYSTEM

An optimal set of thermodynamic functions for the Al-Ni system is obta ined by means of the CALPHAD (CALculation of PHAse Diagrams) technique applied to almost all the experimental phase diagram and thermodynami c data available. The phases are modeled with the association model (l iquid), substitutional solution model (solid solution based on f.c.c. Al-Al and f.c.c. Al-Ni), as a stoichiometric compound (Al3Ni), and wit h the sublattice model (Al3Ni2, AlNi, Al3Ni5 and AlNi3). The magnetic contributions to the Gibbs energies are introduced for AlNi, AlNi3 and f.c.c. Al (Al,Ni). Comparison between the calculated and measured pha se diagrams and thermodynamic quantities show that most of the experim ental information is satisfactorily accounted for by the thermodynamic calculation.