Patent ID: 6042627
Filing Date: 2000-03-28
Classification: B24D,C04B,C09K,C22C

Abstract:
A method for preparing an aluminum-boron-carbon abrasive article comprising heating, under a vacuum or inert atmosphere, a substantially dense body comprised of at least one boron containing phase and at least one carbon containing phase, the boron and carbon containing phase each being selected from the group consisting of: B.sub.4 C; AlB.sub.2 ; AlB.sub.12 ; AlB.sub.12 C.sub.2 ; Al.sub.4 C.sub.3 ; AlB.sub.24,C.sub.4 ; Al.sub.4 B.sub.1-3 C.sub.4 ; AlB.sub.24 C.sub.4 and Al.sub.4 BC, in the presence of a separate source of aluminum such that at least a portion of the surface of said body is contacted by liquid or vaporous aluminum for a time and temperature sufficient to form the aluminum-boron-carbon abrasive article wherein a barrier coating is applied to at least a portion of the surface of the body before heating in the presence of the separate source of aluminum.