Substitution of Ce for (Nd,Pr) in Melt-Spun (Nd,Pr)–Fe–B Powders

Author

Zhongmin Chen ; Yong Keat Lim ; Brown, David

Author_Institution

Molycorp Magnequench Technol. Center, Singapore, Singapore

Volume

51

Issue

11

fYear

2015

Firstpage

1

Lastpage

4

Abstract

The effect of Ce substitution for (Nd,Pr) on structure, microstructure, and magnetic properties of [(Nd_0.75Pr_0.25)_1-xCe_x]_11.65Fe_82.75B_5.6 (x = 0-0.5) melt-spun powders has been studied. It has been found that all Ce-substituted powder samples retain the R₂Fe₁₄B (R = Nd, Pr, Ce) single-phase structure with a similar grain size in the range of 20-22 nm. While Ce substitution leads to lower magnetic properties, lower Curie temperature, and higher flux aging loss in bonded magnets, (Nd,Pr,Ce)-Fe-B melt-spun powders with up to 50% Ce substitution exhibit acceptable overall room-temperature magnetic properties and improved magnetization behavior, and offer a potential low-cost alternative product for low-to-moderate-temperature applications.

Keywords

Curie temperature; ageing; boron alloys; cerium alloys; grain size; iron alloys; magnetisation; neodymium alloys; praseodymium alloys; Curie temperature; [(Nd_0.75Pr_0.25)_1-xCe_x]_11.65Fe_82.75B_5.6; bonded magnets; flux aging loss; grain size; magnetic properties; magnetization; melt-spun powders; microstructural properties; single-phase structure; structural properties; temperature 293 K to 298 K; Magnetic flux; Magnetic properties; Perpendicular magnetic anisotropy; Powders; Saturation magnetization; Temperature; Ce substitution; Nd-Fe-B; Nd???Fe???B; melt spun; melt-spun;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2015.2437376

Filename

7118721