2746 AEによる三次元織SiC/SiC複合材料の曲げ応力下における損傷評価(S18-2 セラミックス(2),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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The bending fracture process of the 3D-woven SiC/SiC composites was investigated by the acoustic emission (AE) technique. The SiC matrix was made by chemical vapor infiltration (CVI) and polymer impregnation and pyrolysis (PIP). The volume fraction of the matrix was varied by selecting the number of PIP cycles; two (poor), four (standard) and nine (rich). The AE activity during loading and unloading was analyzed and correlated with the micro-damages of both the fibers and matrices. As a result, the rich matrix composite showed the quickest accumulation of the micro-damage. The poor matrix composite showed fluctuation in stress-displacement curve accompanied with catastrophic fiber-buckling. The standard matrix composite had excellent characteristics showing the latest initiation and relatively small accumulation of the micro-damages.
社団法人日本機械学会の論文
2007-09-07