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

作者：Han, Wei; Chen, Qiong; Ye, Ke; Yan, Yongde; Zhang, Milin^*

来源：Acta Metallurgica Sinica (English Letters), 2010, 23(2): 129-136.

DOI：10.11890/1006-7191-102-129

• Mg-Li-Al
• Molten salts
• Co-electrodeposition
• Electrolysis

This work presents a study on electrochemical formation of Mg-Li-Al alloys on an inert electrode (Mo electrode) in a molten KCl-LiCl-AlCl3-MgCl2-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 Al 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 degrees C, the highest current efficiency reaches as high as 86%. Lithium combined with magnesium forms Li0.92Mg4.08 and Li3Mg7, and aluminum mainly exists in a form of Mg0.58Al0.42, distributing in the alpha phases and beta phases.

• 出版日期2010-4
• 单位哈尔滨工程大学