A combined application of oxide and oxygen-free high-melting compounds in ZrN-ZrB2-ZrO2 ceramics raises the oxidization resistance of the oxygen-free components in the system. The use of hot compaction for sintering ceramics produced from composite materials makes it possible to achieve 98% of the theoretical density, which is especially important for very hard materials, where the presence of defects perceptibly lowers the real strength parameters. Ahigh density and the absence of open porosity on the surface of composite ceramics allows for a full use of the high-temperature potential of high-melting, oxygen-free compounds in thermally stressed service conditions.
Refractories and Industrial Ceramics – Springer Journals
Published: May 18, 2006
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