New preparation of Mg-Li-Al alloys by electrolysis in molten salt

作     者：Wei HAN Qiong CHEN Ke YE Yongde YAN Milin ZHANG 

作者机构：Key Laboratory of Superlight Materials and Surface Technology Ministry of Education College of MaterialScience and chemical Engineering Harbin Engineering University Harbin 150001 China 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2010年第23卷第2期

页      面：129-136页

核心收录：

学科分类：081702[工学-化学工艺] 080603[工学-有色金属冶金] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0703[理学-化学] 0811[工学-控制科学与工程] 

基　　金：supported by National High Technical Research and Development Programme of China (No.2006AA03Z510) the National Natural Science Foundation of China (No.50871033) the Scientific Technology Bureau of Harbin(No.2009RFLXG012) 

主　　题：Mg-Li-Al Molten salts Co-electrodeposition Electrolysis 

摘      要：This work presents a study on electrochemical formation of Mg-Li-Al alloys on an inert electrode （Mo electrode） in a molten KCl-LiCl-AlC13-MgCI2-KF system. It aims at preparation Mg-Li-Al metal alloy directly under an optimal electrolytic parameters. Main factors which affect current efficiency are investigated. We have discussed the co-electrodeposition conditions and the effect of technical parameters on these experiments, and gained a good electrolytic process. The result of calculation shows that co-electrodeposition Mg, Li and A1 occurs at the cathode current density higher than 9 A/cm^2 and electrolytic voltage between 6 to 9 V. And at the optimal parameters, 12-13 A/cm^2, 620-640 ℃, the highest current efficiency reaches as high as 86%. Lithium combined with magnesium forms Li0.92Mg4.0s and LiaMg7, and aluminum mainly exists in a form of Mg0.58Al0.42, distributing in the alpha phases and beta phases.