Cubic boron nitride abrasive composite

Details Cubic boron nitride abrasive composite Cubic boron nitride abrasive composite

B - Operations, Transporting

24

D

57/23

B24D 3/06 (2006.01)

Patent

CA 1103940

RD-8040 ABSTRACT OF THE DISCLOSURE A mass of cubic boron nitride (CBN) crystals, aluminum or aluminum alloy and a silicon carbide ceramic substrate are disposed in a container which is placed within a pressure- transmitting powder medium. Pressure ranging from about 20,000 psi to about 200,000 psi is applied to the powder medium resulting in substantially isostatic pressure being applied to the container and its contents. To the resulting shaped substantially-isostatic system of powder-enveloped container, heat and pressure are applied simultaneously whereby the aluminum or aluminum alloy is liquefied and infiltrated through the interstices between the CBN crystals and diffused into the contacting face of the silicon carbide substrate sufficiently to produce, upon cooling, an adher- ently bonded integral composite.

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