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作者:

Xiao, Yifei (Xiao, Yifei.) | Zhang, Lele (Zhang, Lele.) | Yang, Wei (Yang, Wei.) | Liu, Tao (Liu, Tao.) | Sun, Qisong (Sun, Qisong.) | Song, Xiaolong (Song, Xiaolong.) | Fang, Yikun (Fang, Yikun.) | Li, Anhua (Li, Anhua.) | Zhu, Minggang (Zhu, Minggang.) | Li, Wei (Li, Wei.)

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EI Scopus SCIE

摘要:

The combination of dual-main-phase (DMP) (Nd, Ce)-Fe-B magnets and grain boundary diffusion process (GBDP) is currently a research topic for obtaining high-cost performance materials in rare earth permanent magnet fields. The novel structural features of GBDP (Nd, Ce)-Fe-B magnets give a version of different domain reversal processes from those of non-diffused magnets. In this work, the in -situ magnetic domain evolution of the DMP magnets was observed at elevated temperatures, and the temperature demagnetization and coercivity mechanism of the GBDP dual-main-phase (Nd, Ce)-Fe-B magnets are discussed. The results show that the shell composition of different types of grains in DMP magnets is similar, while the magnetic microstructure results indicate the Ce-rich grains tend to demagnetize first. Dy-rich shell with a high anisotropic field caused by GBDP leads to an increase in the nucleation field, which enhances the coercivity. It is found that much more grains exhibit single domain characteristics in the remanent state for GBDP dual-main-phase (Nd, Ce)-Fe-B magnets. In addition, the grains that undergo demagnetization first are Ce-rich or Nd-rich grains, which is different from that of non-diffused magnets. These results were not found in previous studies but can be intuitively characterized from the perspective of magnetic domains in this work, providing a new perspective and understanding of the performance improvement of magnetic materials. (c) 2024 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.

关键词:

Grain boundary diffusion process (GBDP) Magnetic microstructures Rare earth permanent magnet materials Diffused Dy (Nd Ce)-Fe-B Dual-main-phase

作者机构:

  • [ 1 ] [Xiao, Yifei]Res Inst, Ctr Iron & Steel, Div Funct Mat, Beijing 100081, Peoples R China
  • [ 2 ] [Liu, Tao]Res Inst, Ctr Iron & Steel, Div Funct Mat, Beijing 100081, Peoples R China
  • [ 3 ] [Sun, Qisong]Res Inst, Ctr Iron & Steel, Div Funct Mat, Beijing 100081, Peoples R China
  • [ 4 ] [Song, Xiaolong]Res Inst, Ctr Iron & Steel, Div Funct Mat, Beijing 100081, Peoples R China
  • [ 5 ] [Fang, Yikun]Res Inst, Ctr Iron & Steel, Div Funct Mat, Beijing 100081, Peoples R China
  • [ 6 ] [Li, Anhua]Res Inst, Ctr Iron & Steel, Div Funct Mat, Beijing 100081, Peoples R China
  • [ 7 ] [Zhu, Minggang]Res Inst, Ctr Iron & Steel, Div Funct Mat, Beijing 100081, Peoples R China
  • [ 8 ] [Li, Wei]Res Inst, Ctr Iron & Steel, Div Funct Mat, Beijing 100081, Peoples R China
  • [ 9 ] [Zhang, Lele]Beijing Univ Technol, Beijing 100124, Peoples R China
  • [ 10 ] [Yang, Wei]Mianyang Giant Star Magnet Mat Co Ltd, Mianyang 621000, Peoples R China

通讯作者信息:

  • [Fang, Yikun]Res Inst, Ctr Iron & Steel, Div Funct Mat, Beijing 100081, Peoples R China;;[Li, Wei]Res Inst, Ctr Iron & Steel, Div Funct Mat, Beijing 100081, Peoples R China;;

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来源 :

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY

ISSN: 1005-0302

年份: 2024

卷: 207

页码: 10-23

1 0 . 9 0 0

JCR@2022

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SCOPUS被引频次: 4

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