Title: Influence of microstructure on modal work-of-fracture of carbon fibre/pitch-derived carbon composites

Authors: Satoshi Tanaka, Kouichi Yasuda, Yohtaro Matsuo

Addresses: Department of Metallurgy and Ceramic Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8552, Japan. ' Department of Metallurgy and Ceramic Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8552, Japan. ' Department of Metallurgy and Ceramic Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8552, Japan

Abstract: Influence of microstructure on multi-modal work-of-fracture of carbon fibre/pitch-derived carbon composites (C/C composites) was studied. C/C composites in which matrix textures were flow type and mosaic type were prepared. Besides, C/C composites were heat-treated at 1000°C-2800°C. Modal work-of-fractures of tensile fracture and interlaminar shear fractures of the composites were simultaneously estimated. The modal work-of-fracture of tensile fracture was governed by the energy dissipation in fibre pullout process. The energy dissipation in fibre pull-out process was changed by the volume fraction of fibre, texture of matrix carbon and development of graphite crystallite. On the other hand, the modal work-of-fracture of interlaminar shear fracture was explained by debris density on the interlaminar shear fracture surface.

Keywords: C/C composites; carbon composites; microstructure; modal work-of-fracture; tensile fracture; interlaminar shear fracture; energy dissipation.

DOI: 10.1504/IJMPT.2001.005412

International Journal of Materials and Product Technology, 2001 Vol.16 No.1/2/3, pp.171 - 179

Published online: 01 Oct 2004 *

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