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Author:

Wu, Haihui (Wu, Haihui.) | Wang, Zhanjia (Wang, Zhanjia.) | Liu, Weiqiang (Liu, Weiqiang.) | Fan, Min (Fan, Min.) | Li, Yuqing (Li, Yuqing.) | Ji, Ming (Ji, Ming.) | Du, Ruihua (Du, Ruihua.) | Zhang, Dongtao (Zhang, Dongtao.) | Xiang, Guanzhi (Xiang, Guanzhi.) | Yue, Ming (Yue, Ming.) (Scholars:岳明) | Yi, Xiaofei (Yi, Xiaofei.) | Liu, Youhao (Liu, Youhao.) | Zha, Shanshun (Zha, Shanshun.)

Indexed by:

EI Scopus SCIE

Abstract:

Screen printing technology (SPT) was applied to conduct grain boundary diffusion sintered Nd-Fe-B magnets using TbH3 and TbF3 nanopowders as diffusion sources. TbH3 grain boundary diffusion (HGBD) coating had better adhesion to the magnet surface than TbF3 grain boundary diffusion (FGBD) coating. When the weight gain ratio was 1.0 wt%, the HGBD magnet achieved a coercivity increment of 11.07 kOe under non-pressurized heat treatment, while effectively controlling the magnet's residual C and O elements. However, pressure heat treatment was necessary for the FGBD magnet to improve the coercivity due to the poor adhesion between the coating and the magnet surface, resulting in more residual C and O elements inside the magnet. Moreover, the coercivity of the FGBD magnet only increased by 7.96 kOe. Compared to the FGBD magnet, Tb diffused deeper into the HGBD magnet and formed more (Nd, Tb)2Fe14B-Nd2Fe14B core-shell structures. The formation of core-shell structures greatly enhanced the nucleation field of the reverse domain, thereby increasing the coercivity. Hence, the HGBD magnet had a higher coercivity increment. In addition, the HGBD magnet possessed better coercivity temperature stability than the original and FGBD magnets. Using TbH3 nanopowders as a diffusion source for SPT can achieve higher magnetic properties and simplified processes without pressure.

Keyword:

TbH 3 nanopowders Grain boundary diffusion Coercivity temperature stability Screen printing technology Sintered Nd-Fe-B magnets

Author Community:

  • [ 1 ] [Wu, Haihui]Beijing Univ Technol, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Minist Educ China, Beijing 100124, Peoples R China
  • [ 2 ] [Wang, Zhanjia]Beijing Univ Technol, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Minist Educ China, Beijing 100124, Peoples R China
  • [ 3 ] [Liu, Weiqiang]Beijing Univ Technol, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Minist Educ China, Beijing 100124, Peoples R China
  • [ 4 ] [Li, Yuqing]Beijing Univ Technol, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Minist Educ China, Beijing 100124, Peoples R China
  • [ 5 ] [Ji, Ming]Beijing Univ Technol, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Minist Educ China, Beijing 100124, Peoples R China
  • [ 6 ] [Du, Ruihua]Beijing Univ Technol, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Minist Educ China, Beijing 100124, Peoples R China
  • [ 7 ] [Zhang, Dongtao]Beijing Univ Technol, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Minist Educ China, Beijing 100124, Peoples R China
  • [ 8 ] [Xiang, Guanzhi]Beijing Univ Technol, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Minist Educ China, Beijing 100124, Peoples R China
  • [ 9 ] [Yue, Ming]Beijing Univ Technol, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Minist Educ China, Beijing 100124, Peoples R China
  • [ 10 ] [Yi, Xiaofei]State Key Lab Rare Earth Permanent Magnet Mat, Hefei 231500, Peoples R China
  • [ 11 ] [Liu, Youhao]State Key Lab Rare Earth Permanent Magnet Mat, Hefei 231500, Peoples R China
  • [ 12 ] [Zha, Shanshun]State Key Lab Rare Earth Permanent Magnet Mat, Hefei 231500, Peoples R China
  • [ 13 ] [Yi, Xiaofei]Earth Panda Adv Magnet Mat Co Ltd, Hefei 231500, Peoples R China
  • [ 14 ] [Liu, Youhao]Earth Panda Adv Magnet Mat Co Ltd, Hefei 231500, Peoples R China
  • [ 15 ] [Zha, Shanshun]Earth Panda Adv Magnet Mat Co Ltd, Hefei 231500, Peoples R China

Reprint Author's Address:

  • [Liu, Weiqiang]Beijing Univ Technol, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Minist Educ China, Beijing 100124, Peoples R China;;[Yue, Ming]Beijing Univ Technol, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Minist Educ China, Beijing 100124, Peoples R China;;

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Source :

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

ISSN: 0304-8853

Year: 2024

Volume: 610

2 . 7 0 0

JCR@2022

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 1

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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