Control of Fracture Behavior of Carbon Fiber/Pitch-based Carbon Matrix Composites with Microspace Modification Concept

Abstract

Abstract: Theoretical consideration was conducted on a relation between pore diameter and interfacial area between pores and fibers when pores uniformly distribute in C/C composites. It was shown that bonding at the fiber/matrix interface apparently decreased with decreasing a pore diameter, and consequently a new idea of microspace modification concept was proposed for controlling fracture behavior of C/C composites. Four types of C/C composites with various pore structures were fabricated by hot-pressing, and their fracture behavior was investigated by three point bending tests. The fracture behavior of the C/C composites was changed from brittle one to pseudo ductile one with decreasing the pore diameter. This result supported the validity of the microspace modification concept proposed in this paper.

Key words:

Shiushichi Kimura, Kouichi Yasuda, Yohtaro Matsuo, Aira Hotta. Control of Fracture Behavior of Carbon Fiber/Pitch-based Carbon Matrix Composites with Microspace Modification Concept[J]. J Mater Sci Technol, 1999, 15(05): 393-399.

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Control of Fracture Behavior of Carbon Fiber/Pitch-based Carbon Matrix Composites with Microspace Modification Concept

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