TUNGSTEN CARBIDE COATINGS AND METHOD FOR PRODUCING THE SAME

摘要

The present invention relates to new tungsten carbides which are doped with fluorine in an amount of up to 0.5 wt % and which can also be doped with fluorocarbon compositions. These tungsten carbides are produced according to a new CVD method in which the phase contains tungsten hexafluoride, hydrogen and a carbon-containing gas. This method is characterised in that the carbon-containing gas is previously thermally activated. The tungsten carbide coatings can be applied onto construction material and articles made therefrom. These coatings exhibit a high wear and corrosion resistance as well as a high chemical stability.