Sintered Superhard Materials

Diamond or cubic boron nitride particles can be sintered into strong masses at high temperatures and very high pressures at which these crystalline forms are stable. Most of the desirable physical properties of the sintered masses, such as hardness and thermal conductivity, approach those of large s...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 1980-05, Vol.208 (4446), p.873-880
Main Authors: Wentorf, R. H., DeVries, R. C., Bundy, F. P.
Format: Article
Language:English
Subjects:
Boron
Carbides
Crystals
Cutting tools
Graphite
Hardness
High pressure
Materials
Nitrides
Sintering
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Summary:Diamond or cubic boron nitride particles can be sintered into strong masses at high temperatures and very high pressures at which these crystalline forms are stable. Most of the desirable physical properties of the sintered masses, such as hardness and thermal conductivity, approach those of large single crystals; their resistance to wear and catastrophic splitting is superior. The sintered masses are produced on a commercial scale and are increasingly used as cutting tools on hard or abrasive materials, as wire-drawing dies, in rock drills, and in special high-pressure apparatus.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.208.4446.873