Cubic boron nitride sintered material, cutting tool including cubic boron nitride sintered material, and method of producing cubic boron nitride sintered material
US11396482B2 · kind B2 · utility
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Key dates
| Filing date | Sep 18, 2019 |
| Grant date | Jul 26, 2022 |
| Priority date | — |
| Expiry date | Sep 18, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C26/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A cubic boron nitride sintered material includes: more than or equal to 85 volume % and less than 100 volume % of cubic boron nitride grains; and a remainder of a binder, wherein the binder includes WC, Co and an Al compound, and when a TEM-EDX is used to analyze an interface region including an interface at which the cubic boron nitride grains are adjacent to each other, oxygen exists on a whole or part of the interface, and a width D of a region in which the oxygen exists is more than or equal to 0.1 nm and less than or equal to 10 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.