Reduction of stresses in the polycrystalline abrasive layer of a composite compact with in situ bonded carbide/carbide support
US5560754A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 1995 |
| Grant date | Oct 1, 1996 |
| Priority date | — |
| Expiry date | Jun 13, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2237/36
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention is directed to polycrystalline diamond and cubic boron nitride (CBN) composite compacts and a method of making the same under high temperature/high pressure (HP/HT) processing conditions, and more particularly to HP/HT polycrystalline composite compacts having reduced abrasive layer stresses. The method of the invention involves making a metal carbide supported polycrystalline composite compact under conditions of high pressure and high temperature (HP/HT) in an HP/HT apparatus by the following steps: PA1 (a) placing within an enclosure a mass of abrasive particles, a first mass of metal carbide support material adjacent said abrasive particles, and a second mass of metal carbide support material adjacent said first mass with a layer of brazing filler alloy having a liquidus above about 700.degree. C. between said first and second masses; PA1 (b) subjecting said enclosure to said HP/HT conditions for a time sufficient to form a composite compact wherein said first carbide support is bonded to said second carbide support; and PA1 (c) recovering said composite compact. The resulting composite compact exhibits reduced abrasive table stresses such as result from t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.