Polycrystalline diamond compact cutting elements, earth-boring tools including such cutting elements, and related methods of making and using same
US12344558B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Aug 2, 2022 |
| Grant date | Jul 1, 2025 |
| Priority date | — |
| Expiry date | Jan 19, 2043 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2237/61
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Methods of forming a cutting element include sintering diamond particles at a temperature of at least about 1400° C. under a pressure of at least about 10 GPa in the absence of a metal solvent catalyst so as to form a polycrystalline diamond compact (PDC), providing a barrier material over at least a portion of the PDC, providing a carbide material and a metal binder comprising at least one transition metal element over the barrier material and the PDC, and performing a second sintering process comprising sintering the carbide material, the metal binder, the barrier material, and the PDC at a temperature of at least about 1400° C. under a pressure of at least about 5 GPa to form the cutting element. At least a portion of the PDC proximate an exposed exterior surface of the PDC may be at least substantially free of the metal binder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.