Patent · US Expired

Method for producing tungsten carbides by gas-phase carburization

US7118635B1 · kind B1 · utility

3Cited by

3References

6Claims

0Family size

Assignee

H. C. Starck GmbH & Co. KG · DE

Inventors

Gerhard Gille · Goslar, DE
Benno Gries · Wolfenbüttel, DE
Jörg Bredthauer · Bonn, DE

Key dates

Filing date	Nov 3, 1999
Grant date	Oct 10, 2006
Priority date	—
Expiry date	Nov 3, 2019

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC01P2006/80
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

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 CO2 content greater than the Boudouard equilibrium content corresponding to the carburetion temperature is used as carburetion gas phase.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.