实验采用α-SiC、β-SiC和(1%α-SiC +99%β-SiC)作为起始粉末，以B、C为添加剂，热压烧结SiC陶瓷。其烧结过程中尽管发生多型体之间的转变，但其表现形式为α-SiC的6H→4H和β-SiC的3C→6H两种形式。尽管有大量的长柱状颗粒生成，但是由于没有弱的界面结合，不能原位增强。
Solid state sintered SiC ceramics were obtained by hot pressing of α-SiC, β-SiC and 1%α-SiC +99%β-SiC powders with boride and carbon as additives. Two phase transforms of 3C→6H and 6H→4H occurred during sintering process. The in situ toughening SiC ceramics can't be obtained only by rod-like grains without the weak grain-boundary.
参考文献
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