Study on Process Parameters of Multi-Factor Coupling Fields CVI

Abstract:

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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.

Info:

Periodical:

Key Engineering Materials (Volumes 353-358)

Edited by:

Yu Zhou, Shan-Tung Tu and Xishan Xie

Pages:

1451-1454

DOI:

10.4028/www.scientific.net/KEM.353-358.1451

Citation:

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

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Price:

$35.00

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