フェニルシルセスキオサン系有機無機ハイブリッドから作製した炭素繊維強化シリコンオキシカーバイド複合材料の開発

抄録

Carbon fiber reinforced silicon oxycarbide ceramic matrix composite was prepared. Ceramic matrix was derived from phenylsilsesquioxane organic inorganic hybrid pyrolyzed at 1000-1700℃.The difference in fracture behavior between single fiber composite and fiber bundle composite, optimum heat treatment temperature and the interface of fiber/matrix were investigated. The reaction between fiber/matrix occurred by heat treatment above 1300℃, which was confirmed by the damaged fiber in single fiber composite. On the other hand, the fiber efficiency in fiber bundle composites treated at 1500℃ showed the maximum value. This suggests that the modified layer on carbon fiber, which was formed by the reaction of fiber/matrix, affect the fracture behavior, resulting in the lower interfacial shear strength between matrix and modified layer.