Please use this identifier to cite or link to this item: http://hdl.handle.net/10497/22401
Title: 
Authors: 
Keywords: 
NdFeB magnets
Magnetron sputtering
Pr Zn films
Magnetic properties
Thermal stability
Issue Date: 
2020
Citation: 
Li, J. J., Huang, X. Y., Zeng, L. L., Ouyang, B., Yu, X. Q., Yang, M. N., Rawat, R. S., & Zhong, Z. C. (2020). Tuning magnetic properties, thermal stability and microstructure of NdFeB magnets with diffusing Pr-Zn films. Journal of Materials Science & Technology, 41, 81-87. https://doi.org/10.1016/j.jmst.2019.09.024
Abstract: 
Grain boundary diffusion process (GBDP) serves as a promising approach in improving magnetic properties and thermal stability of NdFeB permanent magnets. Herein, non-heavy rare earth Pr-Zn films deposited on the magnet surface using DC-magnetron sputtering system are reported. The thermal stability and coercivity enhancement mechanism of Pr-Zn GBDP magnets were investigated. Results show that the coercivity of Pr-Zn GBDP magnet increases from 963.96 kA m−1 to 1317.14 kA m−1 without any remanence reduction. Notably, the demagnetization curve of Pr-Zn GBDP magnet still remains a high squareness ratio. The temperature coefficient of coercivity and anti-demagnetization ability of Pr-Zn GBDP magnet under high temperatures are improved after GBDP treatment. The well-optimized rare earth-rich (RE-rich) grain boundary phases and high effective anisotropy field of (Nd,RE)2Fe14B magnetic hardening layers surrounding main grains are the key factors to impact the magnetic properties and thermal stability of NdFeB permanent magnets via GBDP treatment.
Description: 
This is the final draft, after peer-review, of a manuscript published in Journal of Materials Science & Technology. The published version is available online at https://doi.org/10.1016/j.jmst.2019.09.024
URI: 
ISSN: 
1005-0302 (print)
Website: 
Grant ID: 
20151BAB216005
3401223391
CSC No. 201703000006
51561009
KJLD14043
Funding Agency: 
National Natural Science Foundation of China
Higher School Science and Technology Landing Project of Jiangxi Province
Youth Science Foundation Project of Jiangxi Province
Doctoral Start up Foundation of Jiangxi University of Science and Technology
China Scholarship Council
Appears in Collections:Journal Articles

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