C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
261/6
C04B 35/56 (2006.01) B01J 3/06 (2006.01) B24D 3/10 (2006.01)
Patent
CA 1105496
ABSTRACT OF THE DISCLOSURE A mass of diamond crystals in contact with a mass of eutectiferous silicon-rich alloy are disposed in a container and placed within a pressure transmitting powder medium. Pressure is applied to the powder medium resulting in substantially isostatic pressure being applied to the container and its contents sufficient to dimensionally stabilize the container and its contents. The resulting shaped substantially isostatic system of powder-enveloped container is hot-pressed whereby fluid eutectiferous silicon- rich alloy is produced and infiltrated as a bonding medium uniformly through the interstices between the diamond crystals and producing, upon cooling, an adherently bonded integral body. The body contains diamond crystals ranging in size from about 1 micron to about 1000 microns. The density of the diamond crystals ranges from about 70% by volume up to about but less than 90% by volume of the body. At least about 85% by volume, and preferably 100% by volume, of the portion of the bonding medium in direct contact with the surfaces of the diamond crystals is silicon carbide. The diamond body is substantially pore-free, and is useful as an abrasive, cutting tool, nozzle or other wear-resistant part.
312785
Devries Robert C.
Lee Minyoung
Szala Lawrence E.
Company General Electric
Eckersley Raymond A.
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