The stability of two types of zirconia-based structural ceramics partially stabilized with magnesium oxide with a different initial content of the monoclinic phase is determined on certified samples. The data obtained make it possible to plot a diagram of resistance to thermal damage (RTD). The materials with a high initial content of the monoclinic phase of ZrO2 (33.5%) cannot be classified as heat-resistant. An x-ray study of samples of two materials with a different initial content of the monoclinic phase of ZrO2 showed that the dependences of the monoclinic-hase content and the bending strength on the temperature of the heat treatment prior to hardening are virtually identical to the course of the RTD curves and demonstrate a difference between the materials studied.
Refractories and Industrial Ceramics – Springer Journals
Published: Nov 26, 2007
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