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Mechanical Properties of C/SiC Composites via Precursor Pyrolysis with Pretreated Carbon Fiber

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Abstract:

3D C/SiC composites were fabricated by polycarbosilane (PCS) infiltration and pyrolysis process. The influence of pretreatment of carbon fiber, including pyrolytic carbon coating and thermal treatment, on mechanical properties of C/SiC composites was investigated. The results showed that the composites without fiber pretreatment had a flexural strength of 154MPa and a fracture toughness of 4.8 MPa•m1/2, while those with carbon coating or thermal treatment had much higher strength and toughness, that is, more than 400MPa and 15MPa•m1/2 respectively. Weak interfacial bonding and better in-situ strength of carbon fiber were main reasons for mechanical property improvement with pretreated carbon fiber.

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Periodical:

Key Engineering Materials (Volumes 336-338)

Pages:

1245-1247

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.336-338.1245

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Online since:

April 2007

Authors:

Song Wang, Zhao Hui Chen, Fan Li, Hai Feng Hu

Keywords:

C/SiC Composite, Mechanical Property, Precursor Pyrolysis, Thermal Treatment

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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