STUDY OF SiC/Si<sub>3</sub>N<sub>4</sub> NANO COMPOSITES BY USING POLYCARBOSILANE AS PRECURSOR

Zhong Ren-zhi; Zhang Chang-rui; Zhou Xin-gui; Zhou An-chen; Chen Yuan-zhi

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Article Navigation > Acta Materiae Compositae Sinica > 1999 > 16(4): 13-16

Zhong Ren-zhi, Zhang Chang-rui, Zhou Xin-gui, et al. STUDY OF SiC/Si3N4 NANO COMPOSITES BY USING POLYCARBOSILANE AS PRECURSOR[J]. Acta Materiae Compositae Sinica, 1999, 16(4): 13-16.

Citation:

Zhong Ren-zhi, Zhang Chang-rui, Zhou Xin-gui, et al. STUDY OF SiC/Si₃N₄ NANO COMPOSITES BY USING POLYCARBOSILANE AS PRECURSOR[J]. Acta Materiae Compositae Sinica, 1999, 16(4): 13-16.

Zhong Ren-zhi, Zhang Chang-rui, Zhou Xin-gui, et al. STUDY OF SiC/Si3N4 NANO COMPOSITES BY USING POLYCARBOSILANE AS PRECURSOR[J]. Acta Materiae Compositae Sinica, 1999, 16(4): 13-16.

Citation:

Zhong Ren-zhi, Zhang Chang-rui, Zhou Xin-gui, et al. STUDY OF SiC/Si₃N₄ NANO COMPOSITES BY USING POLYCARBOSILANE AS PRECURSOR[J]. Acta Materiae Compositae Sinica, 1999, 16(4): 13-16.

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STUDY OF SiC/Si₃N₄ NANO COMPOSITES BY USING POLYCARBOSILANE AS PRECURSOR

Dept. of Materials Engineering and Applied Chemistry, National University of Defense Technology, Changsha 410073

Received Date: 1997-11-27
Rev Recd Date: 1998-08-15
Publish Date: 1999-12-25

Abstract

Abstract

A cost effective SiC/Si₃N₄ nano composite was obtained by in situ synthesis of precursor, using polycarbosilane as precursor. The results showed that the ambitious flexural strength and fracture toughness of this material had improved. The formation of this composites microstructure and the mechanism of fracture were discussed at the same time.It was important to control the formation of SiC nano crystals and the growth of rod like β Si₃N₄ grain.The formation of the intragranular structure and the rod like β Si₃N₄ grains(aspect ratio more than 7.5) was the reason for the improvement properties.
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