Formation of novel sintered composites by high-pressure crystallization of amorphous ceramics

A combination of chemical vapour deposition (CVD) and high-pressure (HP) techniques has achieved the fabrication of the zincblende form of boron nitride (z-BN)-based ceramic composites. The CVD technique provides amorphous B--N--X (X = Al, Si or Ti). The HP technique renders the amorphous samples cr...

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Bibliographic Details
Published in:Journal of materials science 1990-09, Vol.25 (9), p.4157-4161
Main Authors: ONODERA, A, TAKAHASHI, N, YOSHIHARA, H, NAKAE, H, MATSUNAMI, Y, HIRAI, T
Format: Article
Language:English
Subjects:
Abrasives and cutting tools
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Exact sciences and technology
Technical ceramics
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Summary:A combination of chemical vapour deposition (CVD) and high-pressure (HP) techniques has achieved the fabrication of the zincblende form of boron nitride (z-BN)-based ceramic composites. The CVD technique provides amorphous B--N--X (X = Al, Si or Ti). The HP technique renders the amorphous samples crystalline and decomposition into z-Bn plus the respective nitride ( beta -Si sub 3 N sub 4 for instance) occurs. Compacts of the composites are obtained by in situ sintering under high pressure. The compacts exhibit peculiar microstructures composed of z-BN nano-crystals homogeneously dispersed in the nitride matrices. Photomicrographs, Diffraction patterns. 26 ref.--AA
ISSN:0022-2461
1573-4803
DOI:10.1007/BF00582497