Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Metal and nonmetal in final product
Patent
1992-06-11
1994-04-19
Walsh, Donald P.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Metal and nonmetal in final product
51293, 419 18, 419 31, 419 38, 419 45, 419 47, 419 51, 428568, 428569, B22F 314, B22F 706
Patent
active
053043421
ABSTRACT:
A sintered product useful for abrasion- and impact-resistant tools and the like is provided comprising an iron-group metal binder and refractory metal carbide particles, e.g. tungsten carbide, formed in situ during sintering by the exothermic reaction of a carbide-forming refractory metal powder with a carbon source mixed therewith. The sintering is carried out at an elevated temperature and at a pressure at which diamond is stable in the presence of a liquid phase comprised substantially of an iron-group binder metal, refractory metal, and dissolved carbon. The product may optionally contain diamond, up to about 95% in volume, enabling its properties to be tailored for a wide range of applications.
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Hall David R.
Hall, Jr. H. Tracy
Greaves J. N.
Walsh Donald P.
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