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Abstract <p>Waste highly-oxidized Nd–Fe–B-based permanent magnets were subjected to milling and subsequent treatment with thermal plasma jet. X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM), and energy dispersive analysis are used to characterize the phase composition of powder particles solidified after the treatment. The separation of heavy and light rare-earth metal constituents of a permanent magnet alloy is demonstrated. The treatment with thermal plasma jet followed by rapid cooling during solidification of powder particles can be suggested as possible recycling process of end-of-life permanent magnets.</p>

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Solidification Behavior of Waste Nd–Fe–B-Based Powders during Thermal Plasma Jet Treatment: Sustainable Processing

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • I. V. Belyaev,
  • N. B. Kolchugina,
  • A. V. Samokhin,
  • V. E. Bazhenov,
  • P. S. Mogil’nikov,
  • N. P. Edunov,
  • P. A. Prokofev,
  • R. A. Vakhrushev,
  • A. A. Fadeev,
  • M. V. Zheleznyi

摘要

Abstract

Waste highly-oxidized Nd–Fe–B-based permanent magnets were subjected to milling and subsequent treatment with thermal plasma jet. X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM), and energy dispersive analysis are used to characterize the phase composition of powder particles solidified after the treatment. The separation of heavy and light rare-earth metal constituents of a permanent magnet alloy is demonstrated. The treatment with thermal plasma jet followed by rapid cooling during solidification of powder particles can be suggested as possible recycling process of end-of-life permanent magnets.