Ultrafiie WC powders were produced from WCla-C3Hs-H2 gas mixtures in a conventional tubular hot-wall downstream CVD reactor. At reaction temperatures between 1100 and 1550°C powders containing W, WZC, WC and carbon were produced. The overall chemical compositions of the tungsten coinpounds as well as the free carbon contents depended strongly on the reaction temperature and the ratio of the rea...
