Method of forming an abrasive compact of cubic boron nitride
OwnerFrank Rutherford Bellinventor
Life of this patent
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Abstract
An abrasive compact comprising diamond or cubic boron nitride or mixtures thereof held in a matrix of a refractory substance and a substance which dissolves the abrasive particle to at least a limited extent. The compact may be made by subjecting a powdered mixture of the ingredients to conditions of temperature and pressure at which the abrasive particle is crystallographically stable and the solvent substance acts to dissolve the abrasive particle. The refractory substance and solvent substance are preferably so chosen that during compact manufacture there is interaction resulting in the formation of a hard material.
Claims11
A method of making an abrasive compact, comprising the steps of forming a mixture of particles of cubic boron nitride, powdered refractory substance selected from the group consisting of silicon nitride, magnesium oxide, spinel and alumina, and a powdered solvent for cubic boron nitride selected from the group consisting of aluminum, lead, tin, magnesium, lithium and an alloy thereof, and subjecting said mixture to elevated temperature and pressure at which cubic boron nitride is crystallographically stable and said solvent partially dissolves said cubic boron nitride to at least a limited extent.
Dependencies are inferred from the claim text.