Study on Process Parameters of Multi-Factor Coupling Fields CVI


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The C/C composite was rapidly fabricated by Multi-factor coupling fields CVI in a home-made reactor with propylene as carbon source and carbon felt as porous preform. The effect of the temperature and pressure on microstructure and properties of the C/C composites was investigated. Microstructure and morphology of the C/C composites were characterized with optical microscopy, SEM, XRD and Raman spectroscopy. The results show the C/C composite has rough laminar pyrolytic carbon and higher density at conditions of 650°C and 12kPa in 12h. The observed regenerative cones were formed by amplified layers on defects. A new type of pyrocarbon was observed with graphitization degree 77.9% and crystallite size 30.5 nm and Optical and SEM morphologies reveal its peculiar structure. It is called “dot structure” pyrocarbon and its formation mechanism is simple proposed.



Key Engineering Materials (Volumes 353-358)

Edited by:

Yu Zhou, Shan-Tung Tu and Xishan Xie




M. Y. Zhang et al., "Study on Process Parameters of Multi-Factor Coupling Fields CVI", Key Engineering Materials, Vols. 353-358, pp. 1451-1454, 2007

Online since:

September 2007




[1] Golecki I: Mater Sci Eng Vol. 20 (1997), pp.37-124.

[2] Jian-guo Zhao, Ke-zhi Li, He-jun Li and Chuang Wang: Carbon Vol. 44(2006), pp.786-791.


[3] Zhi-yong Xie, Qi-zhong Huang, Zhe-an. Su, Fu-qin Zhang, Ying Gao and Bai-yun Huang: New Carbon Materials Vol. 20 (2005), pp.171-177.

[4] W.G. Zhang, Z.J. Hu and K.J. Hüttinger: Carbon Vol. 40 (2002), pp.2529-2545.

[5] J.C. Bokros: Carbon Vol. 3 (1965), pp.17-20.

[6] W. Benzinger, K.J. Hüttinger: Carbon Vol. 37 (1999), pp.931-940.

[7] L.F. Coffin: Journal American Ceramic Society Vol. 47 (1964), pp.473-478.

[8] Zhi-yong Xie, Qi-zhong Huang, Zhe-an. Su, Ming-yu Zhang, Jin-hua Liang and Bai-yun Huang: Acta Materiae Compositae Sinica Vol. 22 (2005), pp.47-52.

[9] R.O. Grisdale: Journal of Applied Physics Vol. 24 (1953), pp.1082-1091.

[10] A. Mechler, P. Heszler and Z. Marton: Appl Surf Sci Vol. 154 (2000), p.154: 22-28.

[11] O. Feron, F. Langlais and R. Naslain: Chemical Vapor Deposition Vol. 5 (1999), pp.37-47.

[12] J. Lavenac, F. Langlais and O. Feron: Compos Sci Technol Vol. 61 (2001), pp.339-345.

[13] He-jun Li, Ai-jun Li, Rui-cheng Bai and Ke-zhi Li: Carbon Vol. 43 (2005), pp.2937-2950.

[14] A. Becker, K.J. Hettinger: Carbon Vol. 36 (1998), pp.201-211.