Sweep through process for making polycrystalline compacts

Details Sweep through process for making polycrystalline compacts Sweep through process for making polycrystalline compacts

C - Chemistry, Metallurgy

22

C

18/1125, 57/15

C22C 26/00 (2006.01) C22C 29/16 (2006.01)

Patent

CA 1206340

IMPROVED SWEEP THROUGH PROOESS FOR MARING POLYCCRYSTALLINE CCMPACTS ABSTRACT OF THE DISCLOSURE The high pressure/high temperature catalyst sweep through process for making diamond and cubic boron nitride compacts has been improved by adding an intermediate metal or metal alloy. The added metal (whether alone or contained in an alloy) has a melting point below that of the catalyst (e.g. cobalt), is miscible with the catalyst, and preferably sweeps through the mass of abrasive crystals first. This modification has reduced flaw formation in such compacts.

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