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US 4,353,714 AGranted
Polycrystalline silicon-bonded cubic boron nitride body and method
AssigneeGeneral Electric Company
InventorsMinyoung Lee, Lawrence E. Szala
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Abstract
A well-bonded polycrystalline cubic boron nitride body is produced by providing the cubic boron nitride particles with a discontinuous coating of tungsten or molybdenum and then infiltrating them in a mass with molten silicon or silicon-base alloy.
Claims5
A process for producing a bonded polycrystalline cubic boron nitride body of predetermined shape and size which comprises the steps of:
- (a) applying a coating of metal selected from the group consisting of molybdenum and tungsten to a plurality of cubic boron nitride particles covering at least 50 percent of the surface area thereof;
- (b) placing a mass of the coated particles in a mold cavity of size and shape corresponding to the size and shape of the desired bonded polycrystalline body;
- (c) infiltrating said mass of coated particles in the mold cavity under pressure with molten metal selected from the group consisting of silicon and silicon-base alloy;
- (d) cooling the infiltrated mass thereby solidifying the molten metal;
- and
- (e) recovering the resulting bonded polycrystalline cubic boron nitride body from the mold.
3 more elements
Dependencies are inferred from the claim text.