Polycrystalline diamond compact including a non-uniformly leached polycrystalline diamond table and applications therefor
US10364613B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 5, 2018 |
| Grant date | Jul 30, 2019 |
| Priority date | — |
| Expiry date | Jan 5, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C2204/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
In an embodiment, a polycrystalline diamond compacts (“PDC”) includes a substrate and a polycrystalline diamond (“PCD”) table 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 a metallic constituent 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 metallic constituent. 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.