Jo May 25, 2026

The FFC method has been widely used to prepare metal powders and alloy powders from their oxides in molten salts.

Many researchers have employed several electrochemical techniques to study proper mechanisms and experimental conditions for it.

However, there have been no studies reported on the method of preparing Dy-Fe alloy powders from Dy₂O₃-Fe₂O₃ mixtures in molten CaCl₂ by the FFC method.

Kim Pyong Hun, a section head at the Institute of Analysis, has conducted a study to prepare Dy-Fe alloy powders from Dy₂O₃-Fe₂O₃ mixtures in molten CaCl₂ by the FFC method.

In the Dy₂O₃-Fe₂O₃ mixtures for his study, the ratio of Dy to Fe was 1:2. He used the cyclic voltammetry and constant voltage electrolysis.

Three cathodic current peaks were observed in the cyclic voltammetric curves, which explains that the reduction mechanism of Dy₂O₃–Fe₂O₃ mixtures goes through several steps.

The suitable electrolysis conditions for the preparation of alloy DyFe₂ from Dy₂O₃–Fe₂O₃ mixtures in molten CaCl₂ were 2.8 V, 850 ℃ and 20 h.

You can find more information in his paper “Preparation of Dy-Fe Alloy Powders from Dy₂O₃–Fe₂O₃ Mixtures in Molten CaCl₂ by FFC Method” in “Transactions of the Indian Institute of Metals” (SCI).