Development Trend of Hydrogen-based Technique for Nd-Fe-B Permanent Magnets

被引:0
|
作者
Yoo, Jae-Gyeong [1 ]
Kim, Tae-Hoon [1 ]
Cha, Hee-Ryoung [1 ]
Kim, Sumin [1 ]
Lee, Jung-Goo [1 ]
机构
[1] Korea Inst Mat Sci, Dept Magnet Mat, Chang Won 51508, South Korea
来源
基金
新加坡国家研究基金会;
关键词
Nd-Fe-B permanent magnets; hydrogenation-decrepitation; hydrogenation-disproportionation-desorption-recombination; recycling; DESORPTION-RECOMBINATION PROCESS; ANISOTROPIC BONDED MAGNET; HDDR-PROCESS; MICROSTRUCTURAL CHANGES; COERCIVITY ENHANCEMENT; TEXTURE MEMORY; GRAIN-SIZE; DISPROPORTIONATION; NDFEB; ALLOYS;
D O I
10.4283/JKMS.2024.34.2.085
中图分类号
O59 [应用物理学];
学科分类号
摘要
The demand for Nd-Fe-B permanent magnets is rapidly increasing as a most important material for traction motors of hybrid/ electric vehicles along with the growth of the eco-friendly mobility field due to industrial changes. However, the issues on the price of heavy rare-earth (HRE) elements, added to improve the thermal stability of the magnet, are constantly arising. To manufacture high-performance magnets by reducing the amount of HRE or Nd, it is important to refine the grain size of the Nd2Fe14B phase (similar to 300 nm). Hydrogen-based technologies such as hydrogenation-Decrepitation and the Hydrogenation-Disproportionation-DesorptionRecombination (HDDR) process are essential for obtaining fine anisotropic powders in manufacturing of sintered and bonded magnets. Furthermore, it can also be applied to the recycling of Nd-Fe-B waste magnets to address future rare-earth resource issues. Herein, we introduce the trend in research and development of the hydrogen-based technology for Nd-Fe-B rare-earth permanent magnets.
引用
收藏
页码:85 / 96
页数:12
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