Paper number 376

FLEXURAL BEHAVIOR OF C/C COMPOSITES AT HIGH TEMPERATURE

Yoshihiro Sawada1, Norio Iwashita1, Kazuhiro Fujita1, and Akira Shinjo2

1Osaka National Research Institute - AIST, MITI
1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan
2Ohwada Carbon Industrial Co. Ltd.
2-1-16 Hinodecho, Toyonaka, Osaka 561-0821, Japan

Summary Unidirectional carbon fiber reinforced carbon composites (UD-C/C composites) were prepared from a high strength type PAN-based carbon fiber and a phenol resin. The mechanical behaviors of C/C composites were measured by four points bending and short beam three points bending tests up to 2600C. The modulus and proof stress were constant until 1500C and they were not affected by loading speed, but they measured over 2000C were decreased at slower loading speed. Decreasing modulus and proof stress, plastic deformation was increased. Bending strength and shear strength were increased with the test temperature. Those strengths were influenced by very little presence the disoriented filaments, which was brought about by fabrication process of the composite.
Keywords C/C composites, high temperature, modulus, bending strength, proof stress, plastic deformation, interlaminar shear strength.

Theme : Ceramic Matrix and C/C Composites

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