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铝液在Al₂O₃上润湿性的改善

The Improvement of Wettability of Al₂O₃ by Molten Aluminum

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【Author】 LI Geyang 1,2,NAKAE H2,HANE T2,DAI Jiawei1 (1 State Key Lab of MMCs Shanghai Jiaotong University , Shanghai 20030,China) (2 Department of Materials Science and Engineering , School of Science and Engineering , Waseda University , Tokyo 169 , Japan)

【机构】上海交通大学金属基复合材料国家重点实验室!上海200030 早稻田大学理工学部材料科学与工程系；东京196；早稻田大学理工学部材料科学与工程系!东京196；上海交通大学金属基复合材料国家重点实验室!上海200030；

【摘要】液态铝对 Al2 O3不润湿使该体系复合材料制备困难 ,性能也难以提高。本研究采用改进的座滴法装置测定了纯铝和 Al- La合金在 Al2 O3表面的润湿性 ,并用电子探针分析了 Al- La合金与 Al2 O3的界面。结果表明 :少量稀土元素La的加入可以使铝润湿 Al2 O3,其润湿角从 90 .5°减小到 80°左右。L a与 Al2 O3在液 /固界面反应生成 La2 O3是改善铝对 Al2 O3润湿性的主要原因。更多还原

【Abstract】 WT10.BZ]It is difficult for Al₂O₃/aluminum composites with excellent properties to be fabricated due to nonwetting of Al₂O₃ by molten aluminum In this paper, the wettability of Al₂O₃ by molten aluminum and AlLa alloy was measured with an improved sessile drop technique and the interface between AlLa alloy and Al₂O₃ was analyzed with electron prober The experiment results show Al₂O₃ is wetted by molten aluminum when rare earth element La is added in The wetting angle decreases from 905° to about 80° This phenomenon results from La₂O₃ produced in the interf ace by reaction of La and Al₂O₃更多还原