Effect of diffusing TbH3 on magnetic, corrosion and mechanical properties of NdFeB magnet

Toujun Zhou; Xinxin Yang; Qianru Wang; Jie Chen; Weizong Bao; Bohua Yu; Renhui Liu; Guoqiang Xie

doi:10.1016/j.jallcom.2023.172079

Effect of diffusing TbH₃ on magnetic, corrosion and mechanical properties of NdFeB magnet

Toujun Zhou
, Xinxin Yang
, Qianru Wang
, Jie Chen
, Weizong Bao
, Bohua Yu
, Renhui Liu
, Guoqiang Xie^*

^*Corresponding author for this work

Harbin Institute of Technology (Shenzhen)
Jiangxi University of Science and Technology

Research output: Contribution to journal › Article › peer-review

25 Scopus citations

Abstract

Grain boundary diffusion can enhance the coercivity of NdFeB magnets with low consumption of heavy rare earths Dy/Tb. This work systematically studied the effects of diffusing TbH₃ on the magnetic, corrosion and mechanical properties of NdFeB magnet. The results show that the remanence B_r and maximum energy product (BH)_max of magnets slightly decreased after diffusion, while coercivity increased from 14.47 kOe to 22.08 kOe with 0.20 wt% Tb usage. The formation of Tb-rich shell and RE-(FeO) metallic-type grain boundary phases attribute to the enhancement of coercivity. The fracture and corrosion behavior of NdFeB magnet are discussed before and after diffusion. This study provides an experiment and theoretical basis for the industry fabrication of high-performance magnet with low heavy rare earth.

Original language	English
Article number	172079
Journal	Journal of Alloys and Compounds
Volume	968
DOIs	https://doi.org/10.1016/j.jallcom.2023.172079
State	Published - 15 Dec 2023
Externally published	Yes

Keywords

Core-shell structures
Corrosion resistance
Mechanical properties
Sintered NdFeB magnet
Terbium hydride

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10.1016/j.jallcom.2023.172079

Cite this

@article{0b2b7468eaa64d76a9517bcbf42c2987,

title = "Effect of diffusing TbH3 on magnetic, corrosion and mechanical properties of NdFeB magnet",

abstract = "Grain boundary diffusion can enhance the coercivity of NdFeB magnets with low consumption of heavy rare earths Dy/Tb. This work systematically studied the effects of diffusing TbH3 on the magnetic, corrosion and mechanical properties of NdFeB magnet. The results show that the remanence Br and maximum energy product (BH)max of magnets slightly decreased after diffusion, while coercivity increased from 14.47 kOe to 22.08 kOe with 0.20 wt\% Tb usage. The formation of Tb-rich shell and RE-(FeO) metallic-type grain boundary phases attribute to the enhancement of coercivity. The fracture and corrosion behavior of NdFeB magnet are discussed before and after diffusion. This study provides an experiment and theoretical basis for the industry fabrication of high-performance magnet with low heavy rare earth.",

keywords = "Core-shell structures, Corrosion resistance, Mechanical properties, Sintered NdFeB magnet, Terbium hydride",

author = "Toujun Zhou and Xinxin Yang and Qianru Wang and Jie Chen and Weizong Bao and Bohua Yu and Renhui Liu and Guoqiang Xie",

note = "Publisher Copyright: {\textcopyright} 2023 Elsevier B.V.",

year = "2023",

month = dec,

day = "15",

doi = "10.1016/j.jallcom.2023.172079",

language = "英语",

volume = "968",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Effect of diffusing TbH3 on magnetic, corrosion and mechanical properties of NdFeB magnet

AU - Zhou, Toujun

AU - Yang, Xinxin

AU - Wang, Qianru

AU - Chen, Jie

AU - Bao, Weizong

AU - Yu, Bohua

AU - Liu, Renhui

AU - Xie, Guoqiang

PY - 2023/12/15

Y1 - 2023/12/15

N2 - Grain boundary diffusion can enhance the coercivity of NdFeB magnets with low consumption of heavy rare earths Dy/Tb. This work systematically studied the effects of diffusing TbH3 on the magnetic, corrosion and mechanical properties of NdFeB magnet. The results show that the remanence Br and maximum energy product (BH)max of magnets slightly decreased after diffusion, while coercivity increased from 14.47 kOe to 22.08 kOe with 0.20 wt% Tb usage. The formation of Tb-rich shell and RE-(FeO) metallic-type grain boundary phases attribute to the enhancement of coercivity. The fracture and corrosion behavior of NdFeB magnet are discussed before and after diffusion. This study provides an experiment and theoretical basis for the industry fabrication of high-performance magnet with low heavy rare earth.

AB - Grain boundary diffusion can enhance the coercivity of NdFeB magnets with low consumption of heavy rare earths Dy/Tb. This work systematically studied the effects of diffusing TbH3 on the magnetic, corrosion and mechanical properties of NdFeB magnet. The results show that the remanence Br and maximum energy product (BH)max of magnets slightly decreased after diffusion, while coercivity increased from 14.47 kOe to 22.08 kOe with 0.20 wt% Tb usage. The formation of Tb-rich shell and RE-(FeO) metallic-type grain boundary phases attribute to the enhancement of coercivity. The fracture and corrosion behavior of NdFeB magnet are discussed before and after diffusion. This study provides an experiment and theoretical basis for the industry fabrication of high-performance magnet with low heavy rare earth.

KW - Core-shell structures

KW - Corrosion resistance

KW - Mechanical properties

KW - Sintered NdFeB magnet

KW - Terbium hydride

UR - https://www.scopus.com/pages/publications/85170427791

U2 - 10.1016/j.jallcom.2023.172079

DO - 10.1016/j.jallcom.2023.172079

M3 - 文章

AN - SCOPUS:85170427791

SN - 0925-8388

VL - 968

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

M1 - 172079

ER -

Effect of diffusing TbH₃ on magnetic, corrosion and mechanical properties of NdFeB magnet

Abstract

Keywords

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