Fabrication of supported polycrystalline abrasive compacts
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United States of America Patent
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Jul 31, 1990
Grant Date -
N/A
app pub date -
Nov 30, 1988
filing date -
Nov 30, 1988
priority date (Note) -
Expired
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Abstract
Disclosed is a process for fabricating a supported polycrystalline diamond or CBN bi-layer compact which comprises forming a sintered polycrystalline or CBN compact which preferably is a thermally-stable compact. A cemented carbide support is separately formed. The compact and the support then are mated with a layer of diamond or CBN crystals having the largest dimension of between about 30 and 500 micrometers interposed therebetween. A source of catalyst/sintering aid material is provided in association with the layer of interposed crystals. The entire assembly then is subjected to HP/HT conditions and for a time adequate for converting the diamond or CBN crystals into a polycrystalline diamond or CBN layer and for producing the bi-layer supported compact of the present invention.
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