Abstract
The electrochemical formation of RE-Zn (RE=Dy, Nd) alloys were studied in LiCl-KCl-RECl3 (0.50 mol% added) at 653 K. The electrochemical behavior of Dy (III) was investigated by cyclic voltammetry using a Zn wire as a working electrode in a molten LiCl-KCl-DyCl3. Cathodic current was observed from 1.10 V. Since this potential is more positive than Dy metal deposition potential, the cathodic current corresponds to the formation of Dy-Zn alloys. Potentiostatic electrolysis at 0.70 V for 1 h using a Zn electrode resulted in formation of the dense and coherent DyZn3 film with the thickness of about 30 µm in a molten LiCl-KCl-DyCl3. Finally, alloy samples were prepared by potentiostatic electrolysis at 0.80-1.20 V for 1 h using Zn plates in a molten LiCl-KCl-DyCl3-NdCl3. The mass ratio of Nd/Dy in the alloy sample was found to be 3.3 at 1.00 V by ICP-AES.
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