Microstructures of short-carbon-fiber-reinforced SiC composites prepared by hot-pressing
- Department of Material Science and Engineering, Harbin University of Science and Technology, Harbin 150040 (China)
- Department of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001 (China)
Microstructures of short-carbon-fiber-reinforced silicon carbide composites, prepared by hot-pressing with MgO-Al{sub 2}O{sub 3}-Y{sub 2}O{sub 3} as sintering additives, were investigated by means of X-ray diffractometry, scanning electron microscopy, and transmission electron microscopy. The results showed that the composites could be densified at a relatively low temperature of 1800 deg. C via the liquid-phase-sintering mechanism. The amorphous interphase in the composites not only avoided the direct contact of the fibers with the matrix, but also improved the fiber/matrix bonding, so they could improve the densification of the composites and avoid the degeneration of the carbon fiber. The nano silicon carbide derived from polycarbosilane, could play a role of improving the relative density of the composites.
- OSTI ID:
- 21192578
- Journal Information:
- Materials Characterization, Vol. 59, Issue 12; Other Information: DOI: 10.1016/j.matchar.2008.04.006; PII: S1044-5803(08)00134-4; Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 1044-5803
- Country of Publication:
- United States
- Language:
- English
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