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Grain boundary diffusion of magnetron sputter coated heavy rare earth elements in sintered Nd-Fe-B magnet
Wu, Binghui; Zhang, Qingke; Li, Weidong; Ding, Xuefeng; Yang, Lijing; Wattoo, Abdul Ghafar; Zhang, Lijiao; Mao, Shoudong; Song, Zhenlun
2018
发表期刊JOURNAL OF APPLIED PHYSICS
卷号123期号:24
摘要The diffusion of Tb or Dy heavy rare earth elements (HREEs) coated on sintered Nd-Fe-B magnets by a direct current (DC) magnetron sputtering and its influences on microstructure, magnetic properties and electrochemical properties of the magnets were investigated. The results reveal that the HREE diffuses into the magnet and substitutes some of the Nd to form a (Nd1-xHREEx)(2)Fe14B shell. The HREE concentration along the direction perpendicular to the sputtered coating surface shows a dual-trend distribution, which was considered to be induced by a fast diffusion in the grain boundary phase and a slow diffusion in the grain phase. The diffusion of DC magnetron sputtered metallic Tb or Dy shows higher efficiency of HREE consumption and greater gain of the coercivity compared with diffusion sources prepared by some other coating methods or consisted of HREE compounds. The coercivity increases from 14.6 kOe for a 5 mm thick original specimen to 24.0 kOe and 19.5 kOe for the Tb and Dy diffused specimens when the coating thickness on a double surface of the specimen is about 12.0 mu m. The HREE-diffused magnets also show better corrosion resistance. Published by AIP Publishing.
关键词Electrophoretic Deposition Coercivity Enhancement Microstructure Analysis Vapor Sorption Tbf3 Diffusion Ndfeb Magnets Dy Temperature Mechanism Pr
学科领域Materials Science ; Physics
语种英语
文献类型期刊论文
条目标识符http://ir.nimte.ac.cn/handle/174433/17376
专题2018专题
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GB/T 7714
Wu, Binghui,Zhang, Qingke,Li, Weidong,et al. Grain boundary diffusion of magnetron sputter coated heavy rare earth elements in sintered Nd-Fe-B magnet[J]. JOURNAL OF APPLIED PHYSICS,2018,123(24).
APA Wu, Binghui.,Zhang, Qingke.,Li, Weidong.,Ding, Xuefeng.,Yang, Lijing.,...&Song, Zhenlun.(2018).Grain boundary diffusion of magnetron sputter coated heavy rare earth elements in sintered Nd-Fe-B magnet.JOURNAL OF APPLIED PHYSICS,123(24).
MLA Wu, Binghui,et al."Grain boundary diffusion of magnetron sputter coated heavy rare earth elements in sintered Nd-Fe-B magnet".JOURNAL OF APPLIED PHYSICS 123.24(2018).
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