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Abstract
ZrB 2-based ceramics with SiC w were produced by hot pressing at 1750 °C for 1 h from mixed powders after adding liquid polycarbosilane. The obtained ZrB 2-SiC w composites had toughness up to 7.57 MPa m 1/2, which was much higher than those for monolithic ZrB 2, SiC particles reinforced ZrB 2 composites, and other ZrB 2–SiC w composites directly sintered at high temperatures. The added liquid polycarbosilane could reduce the sintering temperatures and restrict the reaction of matrix with whisker, which led to fewer damages to the whisker and high fracture toughness.
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