Cubic boron nitride sintered material and cutting tool
US12410103B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 17, 2020 |
| Grant date | Sep 9, 2025 |
| Priority date | — |
| Expiry date | Sep 20, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C2026/003
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A cubic boron nitride sintered material comprises cubic boron nitride particles, a binding phase, and an interfacial phase. The interfacial phase intervenes between the cubic boron nitride particles and the binding phase. The interfacial phase includes aluminum, nitrogen, boron, and oxygen. A total of an average value of the atomic concentrations of aluminum included in the interfacial phase and an average value of the atomic concentrations of nitrogen included in the interfacial phase is 50.0 at % or more. A ratio of an average value of the atomic concentrations of nitrogen included in the interfacial phase to an average value of the atomic concentrations of boron included in the interfacial phase is more than 1.00.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.