Composite of bonded cubic boron nitride crystals on a silicon ca

Details Composite of bonded cubic boron nitride crystals on a silicon ca Composite of bonded cubic boron nitride crystals on a silicon ca

1977-04-15

1978-08-29

Arnold, Donald J.

Abrasive tool making process, material, or composition

With inorganic material

51309R, 264 60, 264 65, B24D 306

Patent

active

041100840

ABSTRACT:
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 adherently bonded integral composite.

REFERENCES:
patent: 3407445 (1968-10-01), Strong
patent: 3743489 (1973-07-01), Wentorf et al.
patent: 3767371 (1973-10-01), Wentorf et al.
patent: 3871840 (1975-03-01), Wilder
patent: 3982911 (1976-09-01), Lee

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