Cubic boron nitride sintered material and cutting tool including same
US11959156B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 30, 2021 |
| Grant date | Apr 16, 2024 |
| Priority date | — |
| Expiry date | Jul 30, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23B2226/125
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A cubic boron nitride sintered material comprises cubic boron nitride particles and a bonding material, wherein the bonding material comprises at least one first metallic element selected from the group consisting of titanium, zirconium, vanadium, niobium, hafnium, tantalum, chromium, rhenium, molybdenum, and tungsten; cobalt; and aluminum; the cubic boron nitride sintered material has a first interface region sandwiched between an interface between the cubic boron nitride particles and the bonding material, and a first virtual line passing through a point 10 nm apart from the interface to the bonding material side; and when an element that is present at the highest concentration among the first metallic elements in the first interface region is defined as a first element, an atomic concentration of the first element in the first interface region is higher than an atomic concentration of the first element in the bonding material excluding the first interface region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.