Effect of Nd-Co on microstructure and magnetic properties of Nd-Ce-Y-Fe-B sintered magnets

Zhi Jia; Mingpeng Kou; Shuai Cao; Xintong Yang; Guangfei Ding; Shuai Guo; Xiaodong Fan; Bo Zheng; Renjie Chen; Aru Yan

Results in Physics (Sep 2022)

Effect of Nd-Co on microstructure and magnetic properties of Nd-Ce-Y-Fe-B sintered magnets

Zhi Jia,
Mingpeng Kou,
Shuai Cao,
Xintong Yang,
Guangfei Ding,
Shuai Guo,
Xiaodong Fan,
Bo Zheng,
Renjie Chen,
Aru Yan

Affiliations

Zhi Jia: CISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; University of Chinese Academy of Sciences, Beijing 100049, China
Mingpeng Kou: CISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; University of Chinese Academy of Sciences, Beijing 100049, China
Shuai Cao: CISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
Xintong Yang: CISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
Guangfei Ding: CISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; University of Chinese Academy of Sciences, Beijing 100049, China; Corresponding authors at: Zhongguan West Road No. 1219, Zhenhai District, Ningbo, Zhejiang, China.
Shuai Guo: CISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; University of Chinese Academy of Sciences, Beijing 100049, China; Corresponding authors at: Zhongguan West Road No. 1219, Zhenhai District, Ningbo, Zhejiang, China.
Xiaodong Fan: CISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
Bo Zheng: CISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
Renjie Chen: CISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; University of Chinese Academy of Sciences, Beijing 100049, China
Aru Yan: CISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; University of Chinese Academy of Sciences, Beijing 100049, China; Corresponding authors at: Zhongguan West Road No. 1219, Zhenhai District, Ningbo, Zhejiang, China.

Journal volume & issue: Vol. 40
p. 105829

Abstract

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The magnetic properties and microstructure of Nd-Ce-Y-Fe-B magnets with Nd-Co boundary additions (0, 1, 3, and 5 wt%) have been systematically investigated. The coercivity, remanence, and Curie temperature of the magnets showed to be all simultaneously improved with appropriate Nd-Co addition, especially, a significant coercivity increase of 15% accompanied with the remanence optimization was obtained at 3 wt% Nd-Co addition. The analyses revealed that the coercivity enhancement was attributed to the widened grain boundary width and the reduced magnetic exchange coupling between grains by the Nd-Co intergranular introduction. By designing the partial substitution, e.g. Co for Fe and Nd for Ce in matrix phase grains, the remanence improvement was achieved with the increased net magnetic moment, compensating the magnetic dilution brought by the extra alloy additions. Meanwhile, the Curie temperature of the magnet was improved with the weakened negative interaction. The combined intrinsic and microstructural modification in this study provides new insights into the preparation of high-abundance magnets with high coercivity, high remanence, and excellent temperature stability.

Published in Results in Physics

ISSN: 2211-3797 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics
Website: http://www.journals.elsevier.com/results-in-physics/

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