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ZrB2-20vol% SiC composites added with 3vol% Yb2O3 were hot-pressed at 1900°C, and then heat-treated at 2000°C in argon. The effect of heat treatment on phase composition, microstructure, and mechanical properties of the composites was investigated. Results showed that the high temperature heat treatment led to the depletion of Yb-containing phases by decomposition or evaporation, the formation of...
The microstructural evolution of ZrB 2 –20vol% MoSi 2 composites during heat treatment with and without pressure at 2000°C for 1h in argon was investigated. Results showed the materials exhibited a multiphase layered structure after heat treatment without pressure. From surface to center, the layered structure consisted of (1) a Mo layer, (2) a Si layer, (3) a ZrB 2 –MoSi ...
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