Crack-Healing Mechanism by Alumina/SiC Particles/SiC Whiskers Multi-Composite
JOURNAL OF THE JAPAN INSTITUTE OF METALS(2005)
摘要
Alumina reinforced SiC particles and whiskers composites having high crack-healing ability and fracture toughness were prepared. The crack-healing behavior was systematically investigated. From the obtained results, the mechanisms of the composites were studied. For the crack-healing by SiC whiskers alone, partial bonds were formed by connecting between the crack surface and the bridging SiC whiskers. As a result, the crack-healed part has low reliability although the strength is sufficiently recovered by crack-healing. On the contrary, alumina/SiC particles/SiC whiskers multi-composite could form the crack-healed part having high reliability, as the space between the crack surfaces was completely filled with the formed oxide.
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关键词
crack-healing,ceramic matrix composite,structural ceramics,mechanical properties,intelligent materials
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