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US 3,947,616 AGranted
Process for producing cobalt coated refractory metal carbides
AssigneeGTE Sylvania Incorporated
InventorsJoseph E. Ritsko, Donald S. Parsons
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Abstract
Cemented refractory metal carbides are coated with cobalt to a predetermined thickness by immersing a cemented refractory metal carbide in an aqueous slurry consisting essentially of a cobalt source, a hydrazine compound and a buffering agent to provide a pH greater than 7 and maintaining the temperature of the slurry at from about 65.degree. to 90.degree.C for a sufficient time to achieve the desired thickness of cobalt coating on the external surfaces of the cemented refractory metal carbide.
Claims7
A process suitable for treating cemented refractory carbide bodies, said process comprising:
- a. immersing an uncoated cemented carbide body in an aqueous slurry consisting essentially of a cobalt source, a hydrazine compound and a buffering agent to provide a pH greater than 7 and;
- b. maintaining the temperature of the slurry at from about 65.degree.C to about 90.degree.C for greater than 10 minutes.
Dependencies are inferred from the claim text.