2743 先進無気孔型SiCの基礎的特性に及ぼす温度の影響 : 熱衝撃破壊特性(S18-1 セラミックス(1),S18 セラミックスおよびセラミックス系複合材料)

概要

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Advanced Pore-Free SiC (APF-SiC) with super-high strength is expected to be used as engineering structural materials since it has damage tolerance ability by preceding failure of metallic silicon particles In the present study, thermal shock tests of this material were carried out to characterize the fracture behavior. The residual strength after thermal shock was also measured. It is found that the critical temperature difference ΔT_c of this material is larger than that of conventional SiC due to smaller size of pre-existing flaws. As the result, the validity of the Griffith's theory was experimentally confirmed. In addition, the damage tolerance behavior in thermal-shocked materials is not observed because the metallic silicon particles may he failed by thermal shock.
社団法人日本機械学会の論文
2007-09-07