Method for producing composite of diamond and cemented tungsten

Details Method for producing composite of diamond and cemented tungsten Method for producing composite of diamond and cemented tungsten

1981-07-21

1983-10-25

Czaja, Donald E.

Abrasive tool making process, material, or composition

With inorganic material

Metal or metal oxide

51307, B24D 302

Patent

active

044116721

ABSTRACT:
A composite of diamond and cemented tungsten carbide is produced by placing pulverized diamond in adjacency with a tungsten carbide/cobalt composition. The two materials are separated by a metallic material positioned therebetween which material has a melting point, when so utilized, lower than the eutectic point of the tungsten carbide/cobalt composition. The assembly is heated at a temperature high enough to permit melting of the metallic material and in a pressure-temperature region of the carbon phase diagram where diamond is thermodynamically stable but which temperature is insufficient to cause substantial melting of the tungsten carbide/cobalt composition. In this way, a controlled amount of metal is introduced into the pulverized diamond to promote bonding thereof.

REFERENCES:
patent: 3745623 (1973-07-01), Wentrof et al.
patent: 4063909 (1977-12-01), Mitchell
patent: 4215999 (1980-08-01), Phaal
patent: 4219339 (1980-08-01), Wilson
patent: 4225322 (1980-09-01), Knemeyer
patent: 4268276 (1981-05-01), Bovenkerk

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