Method for producing tungsten carbides by gas-phase...

Details Method for producing tungsten carbides by gas-phase... Method for producing tungsten carbides by gas-phase...

2006-10-10

2006-10-10

Wilkins, III, Harry D (Department: 1742)

Metal treatment

Process of modifying or maintaining internal physical...

Carburizing or nitriding using externally supplied carbon or...

C423S440000

Reexamination Certificate

active

07118635

ABSTRACT:
The invention relates to a method for producing wolfram carbides by gas-phase carburetion of wolfram powders and/or suitable wolfram precursor compounds in powder form at temperatures above 850° C. According to the method a CO2/CO mixture with a CO2content greater than the Boudouard equilibrium content corresponding to the carburetion temperature is used as carburetion gas phase.

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Journal of Applied Physics, 21, Jun. 1950, pp. 595-599, B.E. Warren and B.L. Averbach, The Effect of Cold-Work Distortion on X-Ray Patterns.
Nava Alonso F.C. et al: “Tungsten Trioxide Reduction-Carburization with Carbon Monoxide-Carbon Dioxide Mixtures: Kinetics and Thermodynamics”, Int. J. Miner Process, Jun. 1987, Bd. 20, Nr. 102, Seiten 137-151, XP000874467.

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