Importance

Loading Importance Indicators...

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.

Loading the Abstract Image...

First Claim