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
收藏
页码：647 / 656
页数：10
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