Polycrystalline cubic boron nitride and method for manufacturing the same
US11214522B2 · kind B2 · utility
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16Claims
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Key dates
| Filing date | Feb 27, 2020 |
| Grant date | Jan 4, 2022 |
| Priority date | — |
| Expiry date | Feb 27, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/80
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A polycrystalline cubic boron nitride comprising 96% by volume or more of cubic boron nitride, wherein the cubic boron nitride has a dislocation density of more than 8×1015/m2, the polycrystalline cubic boron nitride comprises a plurality of crystal grains, and the plurality of crystal grains have a median diameter d50 of an equivalent circle diameter of less than 100 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.