Change of the Phase Composition and Strength of Al2O3–ZrO2-Ceramic After Hydrothermal Aging

Abstract

The effect of Al₂O₃ weight content on the stability of the phase composition and strength of ceramic in the system Al₂O₃–3Y-ZrO₂ prepared by a commercial technology was determined. It was shown that the introduction of aluminum oxide has a positive effect on the stability of the tetragonal phase of zirconium dioxide during accelerated aging. At the same time increasing the mass content of aluminum oxide from 15 to 80% does not significantly change the ratio t-ZrO₂/m-ZrO₂. It was observed that the strength of all materials containing aluminum oxide increases after aging for 5 h.