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作者:

Xu, Fuyou (Xu, Fuyou.) | Zhang, Hongguo (Zhang, Hongguo.) | Liu, Weiqiang (Liu, Weiqiang.) | Yue, Ming (Yue, Ming.) (学者:岳明) | Zhang, Kefeng (Zhang, Kefeng.) | Meng, Hui (Meng, Hui.) | Wei, Qifeng (Wei, Qifeng.) | Zhang, Baoguo (Zhang, Baoguo.)

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EI Scopus SCIE

摘要:

A newly developed rotational coating process has been used to coat Nd-Fe-B flake-shape powders with Zn. A uniform layer of Zn as thin as 1.5 mu m can be coated on the Nd-Fe-B powders under a proper rotational coating condition. The coercivity decreases by about 4.23% and magnetization decrease by only 1.64% after Zn coating. The antioxidation, on the other hand, is greatly improved. The large mass increase during oxidation starts at 400 degrees C for the Zn-coated powders, 150 degrees C higher than that of the uncoated powders. In addition, during the high -temperature oxidation experiment from 30 degrees C to 450 degrees C, the mass of uncoated powders increases by 2.82%, while the mass of Zn-coated powders only increases by 0.40%. These results prove that the rotational coating is a very effective way to enhance the oxidation resistance of Nd-Fe-B powders, owing to the high-quality coating layer and its good isolation ability for the matrix. The process is also low-cost and easy to achieve mass pro-duction, making it a promising technique for producing high-performance Nd-Fe-B powders.

关键词:

Anti-oxidation Rotational coating Surface modification Nd-Fe-B Zn

作者机构:

  • [ 1 ] [Xu, Fuyou]Beijing Univ Technol, Fac Mat & Mfg, Key Lab Adv Funct Mat, Minist Educ China, Beijing 100124, Peoples R China
  • [ 2 ] [Zhang, Hongguo]Beijing Univ Technol, Fac Mat & Mfg, Key Lab Adv Funct Mat, Minist Educ China, Beijing 100124, Peoples R China
  • [ 3 ] [Liu, Weiqiang]Beijing Univ Technol, Fac Mat & Mfg, Key Lab Adv Funct Mat, Minist Educ China, Beijing 100124, Peoples R China
  • [ 4 ] [Yue, Ming]Beijing Univ Technol, Fac Mat & Mfg, Key Lab Adv Funct Mat, Minist Educ China, Beijing 100124, Peoples R China
  • [ 5 ] [Zhang, Kefeng]Hangzhou Foresee Technol Co Ltd, Hangzhou 311500, Peoples R China
  • [ 6 ] [Meng, Hui]Hangzhou Foresee Technol Co Ltd, Hangzhou 311500, Peoples R China
  • [ 7 ] [Wei, Qifeng]Hangzhou Foresee Technol Co Ltd, Hangzhou 311500, Peoples R China
  • [ 8 ] [Zhang, Baoguo]Hangzhou Foresee Technol Co Ltd, Hangzhou 311500, Peoples R China

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来源 :

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

ISSN: 0304-8853

年份: 2023

卷: 576

2 . 7 0 0

JCR@2022

ESI学科: PHYSICS;

ESI高被引阀值:17

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