Effects of Carbon Fiber Architecture on the Microstructure and Mechanical Property of C/C-SiC Composites

Abstract:

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C/C-SiC composites were rapidly fabricated by a two-steps processing. Firstly a short-cut carbon fiber felt (SC) and a 2D carbon fiber felt (2D) were densified to C/C composites by a thermal gradient chemical vapor infiltration (CVI) method with vaporized kerosene as a precursor in 2h, 3h, 4h and 5h, respectively. Then the C/C composites were infiltrated and reacted with melting silicon to obtain C/C-SiC composites. The results show that, with increase of the CVI time, the densities of the two types of C/C-SiC composites decrease in the range of 2.28g/cm3 to 2.00g/cm3; their porosities increase ranging from 1.3% to 7.5%; the contents of the β-SiC and the unreacted Si phases in the composites decline. The flexural strength of the 2D_C/C-SiC composite is much higher than that of the SC_C/C-SiC composite when prepared in the same condition.

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Periodical:

Edited by:

Hyungsun Kim, JianFeng Yang, Tohru Sekino, Masakazu Anpo and Soo Wohn Lee

Pages:

133-136

DOI:

10.4028/www.scientific.net/MSF.658.133

Citation:

J. P. Wang et al., "Effects of Carbon Fiber Architecture on the Microstructure and Mechanical Property of C/C-SiC Composites", Materials Science Forum, Vol. 658, pp. 133-136, 2010

Online since:

July 2010

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$35.00

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