Metal-matrix diamond or cubic boron nitride composites

Details Metal-matrix diamond or cubic boron nitride composites Metal-matrix diamond or cubic boron nitride composites

B - Operations, Transporting

24

D

B24D 3/10 (2006.01) B22F 3/02 (2006.01)

Patent

CA 2265399

A metal-matrix diamond or cubic boron nitride composite and method of making the same are disclosed. The metal-matrix/diamond composite includes grains of diamond uniformly distributed in a metal matrix. Alternatively, grains of cubic boron nitride may be used. Suitable metals for the metal matrix material may include nickel, cobalt, iron, and mixtures or alloys thereof. Other transition metals also may be used. The metal-matrix/diamond or metal-matrix/cubic boron nitride composite has high fracture toughness due to its fine microstructure. Such a metal-matrix/diamond or metal- matrix/cubic boron nitride composite is suitable for use in blanks or cutting elements for cutting tools, drill bits, dressing tools, and wear parts. It also may be used to make wire drawing dies.

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