炭化ケイ素ウイスカー強化ムライト複合材料の機械的性質(第2報) : ウイスカー径及びウイスカーへのカーボン被覆の影響

概要

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The effects of whisker diameter and carbon-coating of whiskers on the flexural strength and the fracture toughness of SiC-whisker-reinforced mullite composites were studied, and quantification of a crack deflection was attempted. The flexural strength and the fracture toughness gradually increased with increasing the amount of SiC whiskers. The strength slightly decreased with increasing whisker diameter and after coating the SiC whiskers with carbon. In contrast, the fracture toughness slightly increased. The toughening of SiC-whisker-reinforced mullite composites is contributed to mainly by the increase of the elastic modulus by the addition of SiC whiskers with high elastic modulus and the occurrence of debond-bridging in the SiC whisker-mullite matrix interface, but is accompanied by slight crack deflection and whiskerpullout.
社団法人日本セラミックス協会の論文
1999-04-01