Patent ID: 9540885
Date: 2017-01-10
CPC Classifications: B22F,B24D,C04B,C22C,E21B

Claim:
1. A method of fabricating a polycrystalline diamond compact, comprising: forming a polycrystalline diamond table in the presence of a metal-solvent catalyst in a first high-pressure/high-temperature process, the polycrystalline diamond table including a plurality of bonded diamond grains defining a plurality of interstitial regions, at least a portion of the plurality of interstitial regions including the metal-solvent catalyst disposed therein; at least partially leaching the polycrystalline diamond table to remove at least a portion of the metal-solvent catalyst therefrom to form an at least partially leached polycrystalline diamond table; subjecting the at least partially leached polycrystalline diamond table and a substrate to a second high-pressure/high-temperature process under diamond-stable temperature-pressure conditions effective to at least partially infiltrate the at least partially leached polycrystalline diamond table with an alloy infiltrant comprising a cobalt-boron-silicon alloy infiltrant; and wherein the at least partially infiltrated polycrystalline diamond table includes a first region adjacent to the substrate that includes the cobalt-boron-silicon alloy infiltrant disposed in at least a portion of the interstitial regions thereof, and a second region extending inwardly from an exterior surface that is substantially free of the cobalt-boron-silicon alloy infiltrant.