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Porous Si 3 N 4 /SiC ceramics were rapidly prepared with Y 2 O 3 as sintering additive and ZrO 2 as nitrided catalyst, using Si and SiC as starting powders. Porous Si 3 N 4 /SiC ceramics with 5wt% ZrO 2 addition showed a complete nitridation and good mechanical properties (with a high porosity of 34.96%, flexural strength of 150±4.2MPa,...
SiC reinforced Si 3 N 4 based ceramics were fabricated via nitridation of silicon, and the influence of SiC addition on the microstructure and mechanical properties of the as-prepared Si 3 N 4 /SiC ceramics were investigated. With SiC addition increase, β-Si 3 N 4 grains growth was inhibited and equiaxed Si 3 N 4 grains increased. This...
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