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

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

机构地区：[1]Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of MaterialScience and chemical Engineering, Harbin Engineering University, Harbin 150001, China

出　　处：《Acta Metallurgica Sinica(English Letters)》2010年第2期129-136,共8页金属学报（英文版）

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)

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.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.

关 键 词：Mg-Li-Al Molten salts Co-electrodeposition ELECTROLYSIS 

分 类 号：TQ131.11[化学工程—无机化工] TF845[冶金工程—有色金属冶金]