Synthesis of Al2O3/WC powder by aluminothermic reduction and carbonization method①
来源期刊：中国有色金属学报(英文版)2004年第2期
论文作者：韩兵强 李楠
文章页码：246 - 250
Key words：aluminothermic reduction; carbonization; phase composition; composite; thermodynamics
Abstract: Al2O3/WC powder was synthesized by means of aluminothermic reduction-carbonization with metallic Al powder, yellow tungsten oxide and carbon black or graphite as raw materials under the protection of coke granules. The effects of:Al2O3 content, temperature, C/WO3molar ratio, and atmosphere on the synthesis of :Al2O3/WC powder were studied. The results show that the relative content of WC and W2C is strongly influenced by the factors mentioned-above. Carbon black has higher reactivity than graphite. :Al2O3-WC composite is easier to obtain under the protection of coke granules than under argon atmosphere. The CO in the coke layer can easily react with tungsten to form WC and to transfer from W2C to WC.
