Thermodynamic modeling of the yttrium–oxygen system

The updated thermodynamic evaluation of the yttrium–oxygen (Y–O) system is presented. Thermodynamic model parameters of all phases, i.e., liquid, αα-Y, ββ-Y, αα- Y 2O3 and ββ- Y 2O3, have been derived by the least-squares minimization procedure using Thermo-Calc®software. The backward compatibility of the refined parameters with experimental data has been demonstrated by calculation of phase and property diagrams.