Chemistry of inorganic compounds – Carbon or compound thereof – Binary compound
Reexamination Certificate
2011-07-19
2011-07-19
Hendrickson, Stuart (Department: 1736)
Chemistry of inorganic compounds
Carbon or compound thereof
Binary compound
C075S240000
Reexamination Certificate
active
07981394
ABSTRACT:
A method for the treatment of tungsten carbide is provided. The starting material contains tungsten carbide particles of a W—C system represented on a phase diagram showing a monophasic domain of a γ phase having a face-centered cubic structure, upwardly delimited by a liquidus line. The particles are subjected to a homogenization treatment in the monophasic domain, and may be subsequently melted to be spheroidized. They are then quenched to freeze at ambient temperature the monophased structure. Optionally, at least one alloying element may be added to the starting material to enlarge the monophasic domain, thereby increasing the hardenability of the monophased particles.
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Caron Paul
Tremblay Alain
Fish & Richardson P.C.
Hendrickson Stuart
Nanogestion Inc.
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