Polycrystalline diamond compact including a non-uniformly leached polycrystalline diamond table and applications therefor

摘要

Embodiments relate to polycrystalline diamond compacts ("PDCs") including a non-uniformly leached polycrystalline diamond ("PCD") table, and methods of fabricating such PDCs. In an embodiment, a PDC includes a substrate and a PCD table integrally formed with and bonded to the substrate. The PCD table defines an upper surface and at least one peripheral surface. The PCD table includes a plurality of bonded diamond grains. The PCD table includes a first region adjacent to the substrate that includes metal-solvent catalyst disposed interstitially between the bonded diamond grains thereof, and a leached second region extending inwardly from the upper surface and the at least one peripheral surface that is depleted of the metal-solvent catalyst. The leached second region exhibits a leach depth profile having a maximum leach depth that is measured from the upper surface. A leach depth of the leach depth profile decreases with lateral distance from a central axis of the PCD table and toward the at least one peripheral surface.