METHODS OF MAKING POLYCRYSTALLINE DIAMOND COMPACTS

摘要

A polycrystalline diamond compact includes a substrate and a polycrystalline diamond table attached to the substrate. The polycrystalline diamond table includes an upper surface and at least one peripheral surface. Diamond grains of the polycrystalline diamond table define a plurality of interstitial regions. The polycrystalline diamond table includes a region having silicon carbide positioned within at least some of the interstitial regions thereof. In an embodiment, the first region extends over only a selected portion of the upper surface and/or at least a portion of the at least one peripheral surface. In another embodiment, the first region substantially contours the upper surface and a chamfer.

主权项

1. A method of fabricating a polycrystalline diamond compact, comprising:
positioning an at least partially porous polycrystalline diamond body between a silicon-containing material and a substrate, wherein the at least partially porous polycrystalline diamond body exhibits an upper surface, at least one peripheral surface, and a chamfer extending between the upper surface and the at least one peripheral surface; subjecting the at least partially porous polycrystalline diamond body, the silicon-containing material, and the substrate to a high-pressure, high-temperature process to infiltrate a first region that extends inwardly from the upper surface and the chamfer with silicon from the silicon-containing material.