1. Microstructures of short-carbon-fiber-reinforced SiC composites prepared by hot-pressing
- Author
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He, Xiulan, Guo, Yingkui, Zhou, Yu, and Jia, Dechang
- Subjects
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CARBON fibers , *SILICON carbide , *MICROSTRUCTURE , *FIBER-reinforced ceramics , *SINTERING , *SCANNING electron microscopy , *X-ray diffractometers - Abstract
Abstract: Microstructures of short-carbon-fiber-reinforced silicon carbide composites, prepared by hot-pressing with MgO–Al2O3–Y2O3 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 °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. [Copyright &y& Elsevier]
- Published
- 2008
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