Thermodynamic Calculation of the ZrO ₂ –YO _1.5 –MgO System

Abstract

A thermodynamic evaluation of the ZrO 2 ‐MgO system has been developed and combined with previous assessments of the ZrO 2 –YO 1.5 and YO 1.5 –MgO systems to describe the ZrO 2 –YO 1.5 ‐MgO Systems to describe the ZrO 2 –YO 1.5 ‐MgO system by means of Bonnier's equation. The calculated results are shown by isothermal and vertical sections, a projection of the liquidus surfaces, and the reaction scheme. Comparisons between calculated and experimental diagrams demonstrate that the calculations satisfactorily account for most of the available experimental data.