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作者:

Wu, Dan (Wu, Dan.) | Yue, Ming (Yue, Ming.) (学者:岳明) | Liu, Weiqiang (Liu, Weiqiang.) (学者:刘卫强) | Chen, Jingwu (Chen, Jingwu.) | Yi, Xiaofei (Yi, Xiaofei.)

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Scopus SCIE

摘要:

Nd-Fe-B sintered magnets with a giant intrinsic coercivity of 47.1 kOe and a high maximum energy product of 38.5 MGOe have been prepared via a combination of conventional sintering techniques and novel grain boundary diffusion process. Microstructural observations show that the Nd(2)Fe1(4)B main phase grains in the magnets exhibit a core/shell type rare-earth elements distribution, where Tb enriched (Nd,Tb)(2)Fe14B phases are formed in the surface regions of the grains. Magnetic domain observations indicate that these modified surface regions strongly restrain the nucleation process of reversed magnetic domains, leading to a remarkable enhancement of the coercivity and overall magnetic performance of the magnets. [GRAPHICS] [GRAPHICS] IMPACT STATEMENT Nd-Fe-B sintered magnets with an unprecedented overall magnetic property have been fabricated with a novel approach, and the origin of magnetic property enhancement was elaborated via magnetic domain observation.

关键词:

coercivity enhancement Nd-Fe-B sintered magnets gram boundary diffusion magnetic reversal process magnetic domain

作者机构:

  • [ 1 ] [Wu, Dan]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 2 ] [Yue, Ming]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 3 ] [Liu, Weiqiang]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 4 ] [Yue, Ming]State Key Lab Rare Earth Permanent Magnet Mat, Hefei, Anhui, Peoples R China
  • [ 5 ] [Liu, Weiqiang]State Key Lab Rare Earth Permanent Magnet Mat, Hefei, Anhui, Peoples R China
  • [ 6 ] [Chen, Jingwu]State Key Lab Rare Earth Permanent Magnet Mat, Hefei, Anhui, Peoples R China
  • [ 7 ] [Yi, Xiaofei]State Key Lab Rare Earth Permanent Magnet Mat, Hefei, Anhui, Peoples R China
  • [ 8 ] [Chen, Jingwu]Earth Panda Adv Magnet Mat Co Ltd, Hefei, Anhui, Peoples R China
  • [ 9 ] [Yi, Xiaofei]Earth Panda Adv Magnet Mat Co Ltd, Hefei, Anhui, Peoples R China

通讯作者信息:

  • 岳明

    [Yue, Ming]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China

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来源 :

MATERIALS RESEARCH LETTERS

ISSN: 2166-3831

年份: 2018

期: 4

卷: 6

页码: 255-260

8 . 3 0 0

JCR@2022

JCR分区:1

被引次数:

WoS核心集被引频次: 45

SCOPUS被引频次: 44

ESI高被引论文在榜: 0 展开所有

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