Acta Metallurgica Sinica (English Letters) >
New preparation of Mg-Li-Al alloys by electrolysis in molten salt
Received date: 2009-09-15
Revised date: 2009-11-27
Online published: 2010-04-08
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/cm2 and electrolytic voltage between 6 to 9 V. And at the optimal parameters, 12-13 A/cm2, 620-640 ℃, 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.
Key words： Mg-Li-Al; Molten salts; Co-electrodeposition; Electrolysis
HAN Wei , CHEN Qiong , YE Ke , YAN Yong-De , ZHANG Mi-Lin . New preparation of Mg-Li-Al alloys by electrolysis in molten salt[J]. Acta Metallurgica Sinica (English Letters), 2010 , 23(2) : 129 -136 . DOI: 10.11890/1006-7191-102-129
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