Mechanical property enhancement of sintered Nd-Fe-B magnets by dual-scale regulation of microstructure

被引：10

作者：

Zhong, Shuwei ^{[1
,2
]}

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

Rehman, Sajjad Ur ^{[2
,4
]}

Luo, Sangen ^{[1
,2
]}

Li, Longgui ^{[5
]}

Li, Chao ^{[5
]}

Li, Jiajie ^{[1
]}

Ma, Qiang ^{[3
]}

Xiong, Shuhua ^{[4
,6
]}

Bulyk, Ihor ^{[1
]}

Yang, Bin ^{[1
]}

机构：

[1] Jiangxi Univ Sci & Technol, Fac Mat Met & Chem, Ganzhou 341000, Peoples R China

[2] Jiangxi Univ Sci & Technol, Key Lab Dev & Applicat Ion Rare Earth Resources, Minist Educ, Ganzhou 341000, Peoples R China

[3] Ganjiang Innovat Acad, Chinese Acad Sci, Ganzhou 341000, Peoples R China

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

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

[6] Jiangxi Rare Earth Funct Mat Technol Co Ltd, Ganzhou 341000, Peoples R China

来源：

INTERMETALLICS | 2023年 / 152卷

关键词：

Sintered Nd-Fe-B magnets; Rod-like Ti particles; Mechanical properties; Amorphous phase; Dual-scale regulation; IMPACT TOUGHNESS; RICH PHASE; COERCIVITY; CO; TI; DEPENDENCE;

D O I：

10.1016/j.intermet.2022.107772

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The brittleness of sintered Nd-Fe-B magnet limits its applications in high frequency and high vibration envi-ronments. In this study, rod-like Ti particles were applied for dual-scale microstructure regulation to improve the mechanical properties of sintered Nd-Fe-B magnets. The bending strength of Ti-added magnets increased from 403.47 to 631.98 MPa, which shows an increase of 56.6%. The intrinsic coercivity of the Ti-added magnet increased from 15.20 kOe to 17.52 kOe. The mechanical properties and intrinsic coercivity are significantly improved without reducing the remanence. The Ti particles reduced the grain size and favorably altered the alignment of the grains, and hence effectively reduced the stress concentration effect. Furthermore, Ti particles promoted the formation of nano amorphous phase in the grain boundary phase, which greatly improved the strength of the grain boundary phase. This study provides a theoretical basis for the preparation of sintered Nd-Fe-B magnets with excellent mechanical properties.

引用

页数：9

共 39 条

[11] Effect of Tb on the intrinsic coercivity and impact toughness of sintered Nd-Dy-Fe-B magnets [J].