| Synthesis of Al2O3／WC powder by aluminothermic reduction and carbonization method |
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| 引用本文： | 韩兵强,李楠.Synthesis of Al2O3／WC powder by aluminothermic reduction and carbonization method[J].中国有色金属学会会刊,2004,14(2):246-250. |
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| 作者姓名： | 韩兵强 李楠 |
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| 作者单位： | KeyLaboratoryofCeramicandRefractoryofHubeiProvince,WuhanUniversityofScienceandTechnology,Wuhan430081,China |
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| 摘 要： | 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/WO3 molar 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 witht ungsten to form WC and to transfer from W2C to WC.
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| 关 键 词： | 粉末冶金 铝粉 铝热还原 碳化 Al2O3／WC粉末 合成 相组成 |
Synthesis of Al2O3/WC powder by aluminothermic reduction and carbonization method |
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| HAN Bing-qiang,LI Nan.Synthesis of Al2O3/WC powder by aluminothermic reduction and carbonization method[J].Transactions of Nonferrous Metals Society of China,2004,14(2):246-250. |
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| Authors: | HAN Bing-qiang LI Nan |
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| 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/WO3 molar 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 W2 C to WC. |
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| Keywords: | aluminothermic reduction carbonization phase composition composite thermodynamics |
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