Abrasive tool making process – material – or composition – Miscellaneous
Patent
1988-06-14
1989-04-25
Lieberman, Paul
Abrasive tool making process, material, or composition
Miscellaneous
51295, 51307, 51309, B24D 300
Patent
active
048244422
ABSTRACT:
For preparing a composite abrasive product having an active part, formed by a compact containing grains of ultra-hard product representing more than 80% per volume of the compact, each grain being bonded directly to its neighbors so that the compact has a polycrystalline structure, and by a hard and refractory support bonded to the compact, formed essentially of a refractory carbide such tungsten carbide, characterized in that: a layer of ultra-hard product grains (PCD or CBN) is placed in contact with components generating an ultra-hard ceramic binder phase in the cell. The powder layer is covered with a thin layer of tungsten coated with a carbide supplying material and, finally, with a tungsten carbide support. The cell containing the stack thus formed is brought to a temperature and a pressure sufficient to cause plastic phase sintering of the ultra-hard product grains with each other and bonding of the compact to the support.
REFERENCES:
patent: 3663191 (1972-05-01), Kroder
patent: 3868235 (1975-02-01), Held
patent: 4496372 (1985-01-01), Almond et al.
patent: 4505721 (1985-03-01), Almond et al.
patent: 4525178 (1985-06-01), Hall
patent: 4527998 (1985-07-01), Knemeyer
patent: 4604106 (1986-08-01), Hall et al.
Lieberman Paul
Societe Industrielle De Combustible Nucleaire
Thompson Willie J.
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