Polycrystalline diamond body and process
US4231195A · kind A · utility
46Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 24, 1979 |
| Grant date | Nov 4, 1980 |
| Priority date | — |
| Expiry date | May 24, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/96
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An adherently bonded polycrystalline diamond body is produced by forming a charge composed of a mass of diamond crystals in contact with a mass of eutectiferous silicon-rich alloy wherein the alloy is in contact or in association with hexagonal boron nitride, confining such charge within a reaction chamber, subjecting the confined charge to a pressure of at least 25 kilobars, heating the pressure-maintained charge to a temperature sufficient to melt the alloy and at which no significant graphitization of the diamond occurs whereby the alloy infiltrates through the interstices between the diamond crystals producing said body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.