Integral composite of polycristalline diamond and/or cubic boron nitride body phase and substrate phase and process for making it

摘要

A self-supporting composite comprised of a mass of diamond and/or cubic boron nitride crystals coated with elemental non-diamond carbon in contact with a substrate is infiltrated by fluid silicon producing a like-shaped composite of a polycrystalline body phase integrally bonded to a substrate supporting phase.;The composite is useful as an abrasive, cutting tool, nozzle or other wear-resistant part.