Superhard constructions and methods of making same
US12415761B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2017 |
| Grant date | Sep 16, 2025 |
| Priority date | — |
| Expiry date | Feb 25, 2041 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/5735
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A super hard polycrystalline construction has a first region comprising a body of thermally stable polycrystalline super hard material having an exposed surface forming a working surface, and a peripheral side edge, said polycrystalline super hard material comprising a plurality of intergrown grains of super hard material; a second region forming a substrate to the first region; and a third region interposed between the first and second regions. The third region extends across a surface of the second region along an interface, the interface comprising at least a portion having an uneven topology, the third region comprising a composite material having a first phase comprising a plurality of non-intergrown grains of super hard material, and a matrix material, the third region having a wear resistance at least three times less than sintered polycrystalline diamond material having the same average grain size of diamond grains as the super hard grains in the third region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.