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作者:

Liu, W. Q. (Liu, W. Q..) (学者:刘卫强) | Wang, Z. (Wang, Z..) (学者:王湛) | Sun, C. (Sun, C..) | Yue, M. (Yue, M..) (学者:岳明) | Liu, Y. Q. (Liu, Y. Q..) | Zhang, D. T. (Zhang, D. T..) (学者:张东涛) | Zhang, J. X. (Zhang, J. X..)

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摘要:

Nd-Fe-B permanent magnets with a small amount of CuZn5 powders doping were prepared by conventional sintered method. The effects of CuZn5 contents on magnetic properties and microstructure, electrochemical corrosion resistance of sintered Nd-Fe-B magnets were systematically studied. The results show that the magnetic properties of magnets do not have a significant variation by CuZn5 powders doping; the coercivity of magnets rises gradually, while the remanence of the magnets decreases a little with increasing of the CuZn5 amount. The CuZn5 doped magnets have more positive corrosion potential, E-corr, and much lower corrosion current density, i(corr), than the magnets without CuZn5 doping, indicating CuZn5 doping could improve the corrosion resistance. Both Zn and Cu enrich mainly into the Nd-rich phase, fully improve the wettability between the Nd-rich phase and the Nd2Fe14B phase, and repair the defects of the main phase, so the coercivity of magnets doped with CuZn5 powders rises. Such microstructure modification effectively restrains the aggressive inter-granular corrosion. As a result, the CuZn5 doped magnet possesses excellent corrosion resistance in NaCl electrolyte. (C) 2014 AIP Publishing LLC.

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作者机构:

  • [ 1 ] [Liu, W. Q.]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 2 ] [Wang, Z.]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 3 ] [Sun, C.]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 4 ] [Yue, M.]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 5 ] [Liu, Y. Q.]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 6 ] [Zhang, D. T.]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 7 ] [Zhang, J. X.]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China

通讯作者信息:

  • 刘卫强

    [Liu, W. Q.]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China

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来源 :

JOURNAL OF APPLIED PHYSICS

ISSN: 0021-8979

年份: 2014

期: 17

卷: 115

3 . 2 0 0

JCR@2022

ESI学科: PHYSICS;

ESI高被引阀值:202

JCR分区:2

中科院分区:3

被引次数:

WoS核心集被引频次: 2

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