Binderless cBN sintering with cubic press
US11066334B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 27, 2017 |
| Grant date | Jul 20, 2021 |
| Priority date | — |
| Expiry date | Jul 5, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/96
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of sintering a binderless cBN body includes providing a boron nitride particle mixture into a pressure chamber, the boron nitride particle mixture having a first type of boron nitride particles and boron nitride filler particles, and the boron nitride filler particles having a different size and/or type than the first type of boron nitride particles, and sintering the boron nitride particle mixture in the pressure chamber to form the cBN body by generating a pressure in the pressure chamber of less than 7.7 GPa and heating the boron nitride particle mixture to a temperature ranging from about 1900° C. to about 2300° C., wherein the cBN body has a density of at least 97 percent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.