Method for producing composite of diamond and cemented tungsten carbide
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United States of America Patent
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-
Oct 25, 1983
Grant Date -
N/A
app pub date -
Jul 21, 1981
filing date -
Aug 14, 1980
priority date (Note) -
Expired
status (Latency Note)
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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.
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