Supported thermally stable cubic boron nitride tool blanks and method for making the same
US4985050A · kind A · utility
6Cited by
6References
15Claims
0Family size
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Key dates
| Filing date | Aug 15, 1989 |
| Grant date | Jan 15, 1991 |
| Priority date | — |
| Expiry date | Aug 15, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2237/406
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for making supported, thermally stable cubic boron nitride (CBN) or wurtzitic boron nitride (WBN) compacts or wire dies comprising providing a mass of sinterable CBN and WBN particles substantially free of catalytic material and a metal bonded support mass or annulus; positioning a barrier layer between said CBN or WBN mass and said support mass; and subjecting such arrangement of materials to pressure and temperature conditions for a time effective for sintering said CBN or WBN particles and substantially preventing migration of metal bond material into the CBN or WBN mass.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.