Research Progress in the Preparation of Sm-Fe Alloys by Molten Salt Electrolysis Method AITranslate

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Chinese Library Classification Number:TF845[冶金工程—有色金属冶金]

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Samarium iron nitride(Sm₂Fe₁₇N_x)alloy exhibits irreplaceable material advantages in miniaturized permanent magnet actuators and high-temperature motors owing to its exceptional permanent magnetic properties and high-temperature stability.Sm-Fe alloy is regarded as the precursor of the next-generation rare-earth permanent magnet material Sm₂Fe₁₇N_x,and the innovation in its preparation process remains a critical research focus in materials engineering.Molten salt electrolysis method has emerged as a cutting-edge technique for Sm-Fe alloy synthesis,leveraged for its unique capability in in-situ alloying and controlling ability of elemental distribution.This article systematically reviews research progress and existing challenges in the preparation of Sm-Fe alloy by molten salt electrolysis method.Special emphasis is placed on elucidating the electrochemical formation mechanisms of Sm-Fe alloy in chloride-based and fluoride-based molten salt systems.Key scientific issues,including the electrochemical reduction pathways of Sm³⁺and interfacial diffusion kinetics of alloy phase,are comprehensively analyzed.Finally,future research directions aimed at optimizing molten salt electrolysis method for high-performance Sm-Fe alloy fabrication are proposed.