Polycrystalline diamond compacts, methods of fabricating same, and applications using same
US7842111B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 29, 2008 |
| Grant date | Nov 30, 2010 |
| Priority date | — |
| Expiry date | Sep 15, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2352/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Embodiments of the present invention relate to PDCs including a PCD table having an exterior cutting region that exhibits enhanced thermal stability. In one embodiment, a method comprises forming an assembly including a first region having non-diamond carbon material and a second region having a plurality of diamond particles. The method comprises subjecting the assembly to heat and pressure sufficient to form the PDC. In another embodiment, a PDC comprises a substrate and a PCD table bonded to the substrate. The PCD table comprises an exterior cutting region including a plurality of elongated diamond grains that are generally randomly oriented. The PCD table comprises a main region positioned between the substrate and exterior cutting region, and including a plurality of bonded diamond grains. In another embodiment, the first region may include coarse-sized diamond particles instead of non-diamond carbon material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.