Process for the preparation of a composite cubic boron nitride layer abrasive body

Patent · Tue Sep 28 04:00:00 EDT 1976

OSTI ID:7251756

Lee, M

Cubic boron nitride (CBN) crystals of graded particle size are chemically cleaned and disposed in a protective metal cup together with a mass of substrate source material and a concentration of metal for providing an alloy for infusing and wetting the walls of capillary-size voids. The CBN content is increased in density to greater than 70 percent by volume, and placed within a semi-isostatic system of finely divided powder. Pressure in the range of from about 20,000 to about 100,000 psi is applied semi-isostatically to the system and thereby to the metal cup and its contents. Heat and pressure are then simultaneously applied to the semi-isostatic system. Liquefied infusing and wetting alloy enters the interstices between the CBN crystals to bond them together. The entire system is cooled and the strong composite body of metal-bonded CBN directly bonded to a substrate is recovered therefrom.

• Assignee: General Electric Co.
• Patent Number(s): US 3982911
• OSTI ID: 7251756
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360301 -- Composite Materials-- Preparation & Fabrication-- (-1987)
ABRASIVES
BONDING
BORON COMPOUNDS
BORON NITRIDES
COMPOSITE MATERIALS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
CUBIC LATTICES
FABRICATION
JOINING
MACHINE TOOLS
METALLURGY
NITRIDES
NITROGEN COMPOUNDS
PNICTIDES
POWDER METALLURGY
SUBSTRATES