Refinement Mechanism and Influence of Grain Size in Sintered Nd-Fe-B

被引：4

作者：

Luo, Sangen ^{[1
,2
]}

Yang, Munan ^{[1
,2
,3
,4
,5
,6
]}

Xu, Zaiping ^{[1
,2
]}

Rehman, Sajjad Ur ^{[1
,2
]}

Zhong, Shuwei ^{[1
,2
]}

Zou, Yaru ^{[1
,2
]}

Yu, Liming ^{[3
]}

Ma, Qiang ^{[4
]}

Li, Longgui ^{[7
]}

Yang, Bin ^{[1
,2
]}

机构：

[1] Jiangxi Univ Sci & Technol, Jiangxi Key Lab Rare Earth Magnet Mat & Devices, Ganzhou 341000, Peoples R China

[2] Jiangxi Univ Sci & Technol, Inst Rare Earth Magnet Mat & Devices IREMMD, Ganzhou 341000, Peoples R China

[3] Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300072, Peoples R China

[4] Chinese Acad Sci, Jiangxi Inst Rare Earths, Ganzhou 341000, Peoples R China

[5] Natl Rare Earth Funct Mat Innovat Ctr Ltd, Ganzhou 341000, Peoples R China

[6] Guorui Sci Innovat Rare Earth Funct Mat Co Ltd, Ganzhou 341000, Peoples R China

[7] Ganzhou Dongci Rare Earth Co Ltd DMEGC, Ganzhou 341000, Peoples R China

来源：

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2023年 / 36卷 / 02期

关键词：

Grain refinement; Sintered Nd-Fe-B; Magnetic properties; Thermal stability; Corrosion resistance; NUCLEATION CONTROLLED MAGNETS; MAGNETIZATION REVERSAL; INTRINSIC-COERCIVITY; PERMANENT-MAGNETS; DEPENDENCE; TEMPERATURE; GROWTH; PHASE; GA; AL;

D O I：

10.1007/s10948-023-06509-4

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

With the development of science and technology, the demand for high-performance sintered Nd-Fe-B magnets has increased dramatically. Since the grain refinement has a significant effect on the coercivity of sintered Nd-Fe-B magnets, a low-temperature sintering process using fine powder is proposed to control the grain size to improve the coercivity. Through this method, the grain size of the magnets is controlled to about 3.1 mu m, which is smaller than the grain size of the conventionally processed magnet (4.2 mu m). As a result, the intrinsic coercivity is increased by 1.24 kOe and the maximum magnetic energy product is increased by 1.23 MGOe, for the same composition. The influence of grain refinement on the magnet performance is studied in detail, which provides a guiding reference for the development of high-performance Nd-Fe-B sintered magnets.

引用

页码：647 / 656

页数：10

共 50 条

[1] Refinement Mechanism and Influence of Grain Size in Sintered Nd-Fe-B
Sangen Luo
Munan Yang
Zaiping Xu
Sajjad Ur Rehman
Shuwei Zhong
Yaru Zou
Liming Yu
Qiang Ma
Longgui Li
Bin Yang
Journal of Superconductivity and Novel Magnetism, 2023, 36 : 647 - 656
[2] Coercivity enhancement and grain refinement in Nd-Fe-B sintered magnets with pyrite doping by jet milling
Yang, Fang
You, Li
Guo, Zhimeng
Paley, Vladislay
Volinsky, Alex A.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2019, 469 : 146 - 150
[3] Dependence of grain size on grain boundary diffusion mechanism of Nd-Fe-B sintered magnets
Luo, Sangen
Yang, Munan
Xu, Zaiping
Zhao, Tongyun
Rehman, Sajjad Ur
Yu, Xi
Zhong, Shuwei
Wang, Haitao
Jin, Chaoxiang
Ma, Qiang
Yang, Bin
JOURNAL OF ALLOYS AND COMPOUNDS, 2023, 942
[4] Effects of the grain size on domain structure and thermal stability of sintered Nd-Fe-B magnets
Ding, Guangfei
Guo, Shuai
Chen, Ling
Di, Jinghui
Chen, Kan
Chen, Renjie
Lee, Don
Yan, Aru
JOURNAL OF ALLOYS AND COMPOUNDS, 2018, 735 : 1176 - 1180
[5] Micromagnetic simulations on the grain size dependence of coercivity in anisotropic Nd-Fe-B sintered magnets
Sepehri-Amin, H.
Ohkubo, T.
Gruber, M.
Schrefl, T.
Hono, K.
SCRIPTA MATERIALIA, 2014, 89 : 29 - 32
[6] Suppression mechanism of abnormal grain growth by Zr addition in pressless processed Nd-Fe-B sintered magnets
Itakura, Masaru
Sugiyama, Koichi
Akamine, Hiroshi
Nishida, Minoru
Nakamura, Michihide
Mizoguchi, Tetsuhiko
Iriyama, Takahiko
JOURNAL OF ALLOYS AND COMPOUNDS, 2021, 887
[7] Microstructure analysis of Ti-doped sintered Nd-Fe-B magnets
Wu, Zhongwei
Yu, Yongjiang
Zhang, Tieqiao
Yu, Rong
ACTA MATERIALIA, 2024, 265
[8] Microstructure of Nd-Fe-B Sintered Magnets-Structure of Grain Boundaries and Interface
Sasaki, T. T.
Ohkubo, T.
Hono, K.
JOURNAL OF THE JAPAN INSTITUTE OF METALS AND MATERIALS, 2017, 81 (01) : 2 - 10
[9] Understanding the Role of Element Grain Boundary Diffusion Mechanism in Nd-Fe-B Magnets
Zhao, Lizhong
He, Jiayi
Li, Wei
Liu, Xiaolian
Zhang, Jian
Wen, Lin
Zhang, Zhenhua
Hu, Jinwen
Zhang, Jiasheng
Liao, Xuefeng
Xu, Ke
Fan, Wenbing
Song, Wenyue
Yu, Hongya
Zhong, Xichun
Liu, Zhongwu
Zhang, Xuefeng
ADVANCED FUNCTIONAL MATERIALS, 2022, 32 (08)
[10] Mechanism on control technology of grain boundary phase in sintered Nd-Fe-B magnets
Li, Yanfeng
Lai, Bin
Zhu, Minggang
Feng, Haibo
Li, Wei
Du, An
Xiyou Jinshu/Chinese Journal of Rare Metals, 2015, 39 (11): : 988 - 992

← 1 2 3 4 5 →