430 C/C複合材料の繊維-母相界面強度に及ぼす熱処理の影響(セラミック/セラミック基複合材料)

概要

論文の詳細を見る
Carbon fiber reinforced carbon matrix (C/C) composites is suitable materials to space structures due to its competitive properties such as light weight, high heat resistance and high strength. The C/C composite, however, has a practical problem that its fiber coefficient is low at room temperature. The low coefficient is thought to be causally related to variation of interfacial strength between fiber and matrix by heat treatment. In this study, therefore, push out tests were carried out in order to investigate a relationship between the fiber/matrix interfacial strength and heat treatment temperature. For CFRP and heat treated C/C composite at 873 K, appropriate interfacial strength was obtained from the push out tests. In contrast, for the heat treated C/C composites at 1273, 1873 and 2273 K, not only pushing out of fiber but destruction and/or abrasion of matrix were arisen during the tests. This result revealed that the strength obtained from heat treated C/C composites at higher temperature was disaccord with the fiber/matrix interfacial strength due to effects of other factors than pushing out.
2009-11-06