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Oxide evolution in NdDy-Fe-B magnet during aging process 被引量：1

Oxide evolution in NdDy-Fe-B magnet during aging process
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摘要 Sintered NdDy-Fe-B magnets were made from strip cast flakes by powder metallurgy method. For the magnet with 6 wt.% Dy substituted Nd, a remarkable coercivity increase of 70% was obtained after aging at 900 ℃ for 2 h and a high coercivity of 23.5 kOe was achieved after aging at 520 ℃ for 2 h. The average diameter of the oxide particles decreased during the following 900℃ aging treatment. Dy and O diffusion from oxide particles to Nd-rich phase during the aging process was observed. The oxide evolution and Dy element diffusion were helpful to the coercivity enhancement. Sintered NdDy-Fe-B magnets were made from strip cast flakes by powder metallurgy method. For the magnet with 6 wt.% Dy substituted Nd, a remarkable coercivity increase of 70% was obtained after aging at 900 ℃ for 2 h and a high coercivity of 23.5 kOe was achieved after aging at 520 ℃ for 2 h. The average diameter of the oxide particles decreased during the following 900℃ aging treatment. Dy and O diffusion from oxide particles to Nd-rich phase during the aging process was observed. The oxide evolution and Dy element diffusion were helpful to the coercivity enhancement.
作者 王景代 冯海波 李安华 李岩峰 朱明刚 李卫
机构地区 Division of Functional Materials
出处 《Journal of Rare Earths》 SCIE EI CAS CSCD 2012年第10期1020-1023,共4页 稀土学报（英文版）
基金 Project supported by the State Key Development Program for Basic Research of China National High Technology Research and Development Program of China National Natural Science Foundation of China
关键词 permanent magnet aging DYSPROSIUM OXIDE COERCIVITY rare earths permanent magnet aging dysprosium oxide coercivity rare earths
分类号 TF124 [冶金工程—粉末冶金]
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共引文献7

同被引文献15

  • 1刘湘涟,周寿增.Nd-Fe-B磁体烧结过程晶粒长大行为的研究[J].中国稀土学报,2006,24(5):580-585. 被引量：12
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Journal of Rare Earths
2012年 第10期

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