High-pressure sintering of cubic boron nitride

Cubic boron nitride (cBN) powder was compacted at high pressure and high temperature using a solid solution of titanium carbide and titanium nitride (TiC sub x N sub 1--x ) as binding material in the presence of a small amount of Al. Different compositions of TiC sub x N sub 1--x , 0 < x < 1 w...

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Bibliographic Details
Published in:Journal of materials science 1986-12, Vol.21 (12), p.4347-4351
Main Authors: BINDAL, M. M, NAYAR, R. K, SINGHAL, S. K, AJAY DHAR, RAJEEV CHOPRA
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Chemical industry and chemicals
Exact sciences and technology
Refractory products
Special refractories
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Summary:Cubic boron nitride (cBN) powder was compacted at high pressure and high temperature using a solid solution of titanium carbide and titanium nitride (TiC sub x N sub 1--x ) as binding material in the presence of a small amount of Al. Different compositions of TiC sub x N sub 1--x , 0 < x < 1 were used as binders. The weight percentage of cBN, TiC sub x N sub 1--x and Al were optimized and found to be critical; any marked deviation from these optimized values deteriorated the quality of compacts. Various high-pressure sintering parameters such as pressure, temperature and sintering time, etc., were optimized for this binder. The compacts were also characterized using X-ray diffraction, scanning electron microscopy and microhardness measurements. The microstructural and X-ray diffraction observations indicated no marked changes in the compacts as the value of x in TiC sub x N sub 1--x was varied, but the microhardness was found to depend on the value of x. 20 ref.--AA
ISSN:0022-2461
1573-4803
DOI:10.1007/BF01106554