Characterization of the SiCf/SiC Composite Fabricated by the Whisker Growing Assisted CVI Process


Article Preview

To obtain a dense SiCf/SiC composite by the chemical vapor infiltration (CVI) process, whisker growing before matrix filling was applied, which is called the whisker growing assisted CVI process. The whisker growing and matrix filling processes were carried out using MTS (CH3SiCl3) and H2 as source and diluent gases, respectively. Tyranno-SATM was used as a reinforced substrate. Characterizations of SiC whisker grown during the in situ whisker growing process have been investigated. The weight gain rates with the matrix filling time and the density of composites was measured. The flexural strength with the thickness of the pyrolytic carbon (PyC) interlayers has been evaluated. b-SiC whiskers with many stacking faults were grown well in the Tyranno SATM fabrics. Tyranno-SA/SiC composite with a PyC interlayer thickness of 150 nm had a flexural strength of 610 MPa and the density of 2.71 g/cm3.



Edited by:

Hai-Doo Kim, Hua-Tay Lin and Michael J. Hoffmann




J. Y. Park et al., "Characterization of the SiCf/SiC Composite Fabricated by the Whisker Growing Assisted CVI Process ", Key Engineering Materials, Vol. 287, pp. 200-205, 2005

Online since:

June 2005




[1] Comprehensive composite materials, edited by A. Kelly and C. Zweben, published by Elsevier (2000).

[2] D.W. Freitag and D.W. Richerson, Opportunities for Advanced Ceramics to Meet the Needs of the Industries of the Future, DOE/ORO 2076 (1998).

[3] T. M. Besmann, B. W. Sheldon, R. A. Lowden, and D. P. Stinton, Science, 253, (1991) p.1104.

[4] B.J. Oh, Y.J. Lee, D. Jchoi, G.W. Hong, J.Y. Park, and W. J, Kim, J. Am. Ceram. Soc., 84.

[1] (2001) p.245.

[5] J.Y. Park, H.S. Hwang, W.J. Kim, J.I. Kim, J.H. Son, B.J. Oh and D.J. Choi, J. Nucl. Mater., 307-311 (2002) p.1227.

[6] L. Wang, H. Wada and L.F. Allard, J. Mater. Res., 7 (1992) p.148. 0 50 100 150 200 250 300 0 100 200 300 400 500 600 700 Flexsual Strength (MPa) Thickness of PyC Interlayer (nm) Tyranno-SA.

[7] W.S. Seo and K. Koumoto, J. Am. Ceram. Soc., 83.

[10] (2000) p.2584.

[8] W. Yang, T. Noda, H. Araki, J. Yu and A. Kohyama, Mater. Sci. & Eng. A345 (2003) p.28.