Polycrystalline diamond compact including a non-uniformly leached polycrystalline diamond table and applications therefor
US8596387B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 2010 |
| Grant date | Dec 3, 2013 |
| Priority date | — |
| Expiry date | Nov 18, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C2204/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.