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<p>The preparation method of Dy-Fe alloy powders from Dy<sub>2</sub>O<sub>3</sub>–Fe<sub>2</sub>O<sub>3</sub> mixtures in molten CaCl<sub>2</sub> by FFC method was studied. For studying, the Dy<sub>2</sub>O<sub>3</sub>–Fe<sub>2</sub>O<sub>3</sub> mixtures were used as Dy and Fe ratio in 1:2. And the cyclic voltammetry and constant voltage electrolysis were used. There were three cathodic current peaks in the positive scan process of cyclic voltammetric curves. From that, it could be found that there were several steps of the reduction mechanism of Dy<sub>2</sub>O<sub>3</sub>–Fe<sub>2</sub>O<sub>3</sub> mixtures. Firstly, Fe<sub>2</sub>O<sub>3</sub> oxide was electrolyzed to form Fe, and then intermetallic DyFe<sub>5</sub> were obtained from metal Fe and Dy<sub>2</sub>O<sub>3</sub> oxide, and finally they were alloyed to form DyFe<sub>2</sub>. In the electrolysis experiments, the constant voltage, the temperature and the times were studied.</p>

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Preparation of Dy-Fe Alloy Powders from Dy2O3–Fe2O3 Mixtures in Molten CaCl2 by FFC Method

  • 期刊论文

  • 发表日期：

    2025年12月4日

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  • Pyong-Hun Kim,
  • Hyo-Song An,
  • Hyong-Sun Jang

摘要

The preparation method of Dy-Fe alloy powders from Dy2O3–Fe2O3 mixtures in molten CaCl2 by FFC method was studied. For studying, the Dy2O3–Fe2O3 mixtures were used as Dy and Fe ratio in 1:2. And the cyclic voltammetry and constant voltage electrolysis were used. There were three cathodic current peaks in the positive scan process of cyclic voltammetric curves. From that, it could be found that there were several steps of the reduction mechanism of Dy2O3–Fe2O3 mixtures. Firstly, Fe2O3 oxide was electrolyzed to form Fe, and then intermetallic DyFe5 were obtained from metal Fe and Dy2O3 oxide, and finally they were alloyed to form DyFe2. In the electrolysis experiments, the constant voltage, the temperature and the times were studied.