Effect of Powder Size on Fracture Strength and Magnetic Properties

被引：0

作者：

Yu Lianqing ^{[1
]}

Yuan Yongfeng ^{[2
]}

Yan Youguo ^{[1
]}

机构：

[1] China Univ Petr E China, Dongying 257061, Peoples R China

[2] Zhejiang Sci Technol Univ, Hangzhou 310018, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2008年 / 37卷 / 11期

关键词：

particle size; NdFeB; magnetic properties; fracture strength;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The dependence of fracture strength and magnetic properties of sintered NdFeB magnets on jet-milling particle size was studied. It was found that as mean particle size decreased from 4.0 mu m to 2.9 mu m, thet grain size in magnets decreased, which resulted in the bending strength rapidly increased from 212 MPa to 312 MPa, about 50 % increment. Optimum magnetic properties of B-r and (BH)(m) were achieved at mean particle size of 3.3 mu m. H-i(c) increased with the decrease of mean particle size, but the B-r, (BH)(m) decreased due to the increase of amount of much more smaller particles. When mean particle size is more than 3.3 mu m, all of the magnetic properties decrease because of presence of much more larger particles.

引用

页码：2034 / 2036

页数：3

共 6 条

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