B - Operations – Transporting – 24 – D
Patent
B - Operations, Transporting
24
D
57/16
B24D 5/10 (2006.01) B24D 99/00 (2010.01) B22F 7/06 (2006.01) B24D 3/10 (2006.01) B24D 18/00 (2006.01) C22C 26/00 (2006.01)
Patent
CA 1325110
A B S T R A C T A method of producing a thermally stable diamond compact having a metal layer bonded to a surface thereof is provided. The thermally stable diamond compact comprises a mass of diamond particles containing diamond-to-diamond bonding and a second phase uniformly distributed through the diamond mass. The metal of the metallic layer is molybdenum, tantalum, titanium or like high melting refractory metal, nickel or an alloy containing a dominant amount of any one of these metals. The method includes the steps of: (i) preparing an assembly of a metallic layer, a mass of diamond particles on the metallic layer and a layer of the component or components necessary to form the second phase on the diamond particles, this component or these components having a melting point lower than that of the metallic layer; and (ii) placing the assembly in a canister and subjecting the assembly to conditions of elevated temperature and pressure for a period sufficient to produce the diamond abrasive compact, the temperature being first raised to a level where the component or components for the second phase are molten allowing their infiltration into the the diamond mass and the compact to be produced, but the metallic layer is not molten, and thereafter raising it to a level where the metallic layer bonds to the thus formed compact.
607305
de Beers Industrial Diamond Division (proprietary)
Gowling Lafleur Henderson Llp
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