Low-Temperature Aging of Al2O3–[ZrYb]O2 Composites Containing Strontium Hexaaluminate

The effect of the hydrothermal treatment corresponding to accelerated low-temperature aging and simulating a prolonged exposure to a biological environment on the phase composition and bending strength of Al2O3–[ZrYb]O2 composites containing a variable amount of Al2O3 and including strontium hexaaluminate has been investigated. It has been shown that, after the hydrothermal action, the composites retain their bending strength ranging from 700 to 850 MPa, depending on composition. This indicates the preservation of the phase composition in the bulk of the materials. It has been determined that, in the surface layer of the samples, the zirconia monoclinic phase forms in an amount from 11 to 9