Composite sintered material
US11920222B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 3, 2019 |
| Grant date | Mar 5, 2024 |
| Priority date | — |
| Expiry date | Feb 12, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C2026/008
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A composite sintered material includes: a plurality of diamond grains having an average grain size of less than or equal to 10 μm; a plurality of cubic boron nitride grains having an average grain size of less than or equal to 2 μm; and a plurality of aluminum oxide grains having an average grain size of less than or equal to 0.5 μm; and a remainder of a binder phase, wherein at least parts of adjacent diamond grains are bound to one another, the binder phase includes cobalt, in the composite sintered material, a content of the diamond grains is from 30 to 92 volume %, a content of the cubic boron nitride grains is from 3 to 40 volume %, a content of the aluminum oxide grains is from 2 to 15 volume %, and a content of the cobalt is from 3 to 30 volume %.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.