An assessment of the AlO1.5-YO1.5 system

The AlO1.5-YO1.5 system has been assessed using the CALPHAD technique. The liquid phase was described by a subregular substitutional solution model. All solid phases were treated as stoichiometric compounds. A consistent set of parameters describing the Gibbs energy of the phases was obtained by a computerized least squares method. Stable and metastable phase equilibria were calculated with the optimized parameters. Comparisons between the assessed and experimental data are presented.