Fabrication of supported polycrystalline abrasive compacts
AssigneeGeneral Electric Company
InventorHyun S. Cho
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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.
Claims12
A process for fabricating a supported polycrystalline diamond or CBN bi-layer compact which comprises:
- (a) forming a sintered polycrystalline diamond or CBN compact having a surface;
- (b) separately forming a cemented carbide support having a support surface;
- (c) mating said compact and said support at their respective surfaces with a layer of diamond or CBN crystals having a largest dimension of between about 30 and 500 micrometers interposed between said surfaces;
- (d) providing a source of catalyst/sintering aid material in association with said layer of crystals;
- (e) subjecting said mated compact and support to HP/HT conditions and for a time adequate for converting said diamond or CBN crystals into a polycrystalline diamond or CBN layer and for providing a support polycrystalline bi-layer compact comprising at least two polycrystalline layers.
Dependencies are inferred from the claim text.