Supported polycrystalline compacts
AssigneeGeneral Electric Company
InventorFrank J. Csillag
Life of this patent
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Abstract
Disclosed is a process for fabricating a composite polycrystalline diamond or cubic boron nitride (CBN) compact. Briefly, the process is conducted by mating a pre-formed sintered polycrystalline diamond or CBN compact and a plastically deformable support, and subjecting the mated composite compact to elevated temperature and pressure conditions sufficient to plastically deform the support into attachment with the compact. The temperature, pressure and time of application are inadequate to cause degradation of the diamond or CBN compact. The product configuration may be a conventional layered compact or may be a wire drawing die having a polycrystalline diamond or CBN core with a support jacket of a material such as a cemented metal carbide.
Claims20
A process for fabricating a supported polycrystalline diamond or CBN compact which comprises:
- (a) forming a sintered polycrystalline diamond or CBN compact having a surface;
- (b) separately forming a plastically deformable support having a support surface;
- (c) mating said diamond or CBN compact and said support at their respective surfaces;
- (d) subjecting said mated diamond or CBN compact and said support to elevated temperature and pressure conditions sufficient to plastically deform said support surface into attachment with said compact surface, said temperature, pressure and the time of application thereof being inadequate to cause substantial degradation of said diamond or CBN compact;
- and
- (e) recovering the resulting supported compact.
A composite polycrystalline diamond or CBN compact which comprises a pre-sintered compact which has been attached to a metal carbide support at elevated temperature and superatmospheric pressure.
Dependencies are inferred from the claim text.