Effect of Dy Addition on the Magnetic and Mechanical Properties of Sintered Nd–Fe–B Magnets Prepared by Double-Alloy Powder Mixed Method

Author

Hu, Z.H. ; Ma, D.W. ; Qu, H.J. ; Zhao, J.Q. ; Luo, C. ; Wang, H.J.

Author_Institution

Coll. of Mater. Sci. & Eng., Hubei Univ. of Automotive Technol., Shiyan, China

Volume

51

Issue

11

fYear

2015

Firstpage

1

Lastpage

3

Abstract

The effect of Dy addition on the magnetic and mechanical properties of sintered Nd-Fe-B magnets prepared by the double-alloy powder mixed method was investigated. The results showed that the intrinsic coercivity of sintered Nd-Fe-B magnets increases gradually, and the squareness factor of sintered Nd-Fe-B magnets declines with increasing Dy content. The Vickers hardness of sintered Nd-Fe-B magnets increases with increasing Dy content, and the maximum fracture toughness of sintered Nd-Fe-B magnets is obtained when the Dy content is 2 wt%. The bending strength of sintered Nd-Fe-B magnets first declines, and then increases with increasing Dy content. The minimum bending strength of sintered Nd-Fe-B magnets is obtained at the Dy content of 2 wt%. The microstructure showed that the distribution of Dy content in main phase was not uniform because of the Dy diffusion of double-alloy mixed powder during the sintering process.

Keywords

Vickers hardness; bending strength; boron alloys; coercive force; crystal microstructure; diffusion; dysprosium alloys; fracture toughness; iron alloys; magnetic particles; neodymium alloys; sintering; NdFeBDy; Vickers hardness; bending strength; diffusion; double-alloy mixed powder; double-alloy powder mixed method; fracture toughness; intrinsic coercivity; magnetic properties; mechanical properties; microstructure; sintered magnets; squareness factor; Magnetic field measurement; Magnetic properties; Magnetometers; Mechanical factors; Microstructure; Powders; Temperature; Double-alloy powder mixed method; Sintered Nd-Fe-B magnets; double-alloy powder mixed method; magnetic properties; mechanical properties; sintered Nd-Fe???B magnets;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2015.2443122

Filename

7124465