首页|Simultaneously enhancing coercivity and remanence of hot-deformed Nd-Fe-B magnets by flake copper powder assisted DyF3 interflake addition

Simultaneously enhancing coercivity and remanence of hot-deformed Nd-Fe-B magnets by flake copper powder assisted DyF3 interflake addition

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It is still a challenge to simultaneously enhance coercivity(Hcj)and remanence(Jr)of hot-deformed Nd-Fe-B magnet due to the coercivity-remanence trade-off dilemma.Here,we achieved this balance be-tween Hcj and Jr by flake Cu powder assisted DyF3 interflake addition.The Hcj increases from 1218 to 1496 kA/m and Jr increases from 1.32 to 1.34 T compared with the original magnet.Results show that the width of coarse grain layers reduces because of the introduction of flake Cu,which increases the contact areas of the adjacent grains at ribbon interfaces and suppresses the excessive growth of grains.The stronger degree of texture and higher density compared with the original magnet should take the re-sponsibility for the increase of Jr.Additionally,the aggregation regions of rare earth rich(RE-rich)phase reduce and the betterment of the microstructure is another reason for the enhancement of Jr in the flake Cu aided DyF3 hot-deformed magnet.This strategy of using flake powder additives provides a promising method for optimizing microstructure and enhancing magnetic properties of hot-deformed Nd-Fe-B magnets.

Rare earthsNd-Fe-BHot-deformed magnetFlake powderInterflake additionRemanence

Yikuan Hu、Jiajie Li、Shengyu Sun、Shuwei Zhong、Munan Yang、Xiaoqiang Yu、Sajjad Ur Rehman、Xi Yu

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Jiangxi Key Laboratory for Rare Earth Magnetic Materials and Devices,College of Rare Earths,Jiangxi University of Science and Technology,Ganzhou,341000,China

National Rare Earth Functional Materials Innovation Center,Ganzhou,341000,China

Ganzhou Fortune Electronic Ltd.,Ganzhou,341000,China

National Key Research and Development Program of ChinaNational Key Research and Development Program of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Jiangxi Province

2022YFB35052012022YFB35054005226103420224BAB204015

2024

10.1016/j.jre.2023.11.013

稀土学报(英文版)
中国稀土学会

稀土学报(英文版)

CSTPCDEI
影响因子：1.3
ISSN：1002-0721
年,卷(期)：2024.42(7)