Magnetic Properties and Microstructure of Melt-Spun Ce–Fe–B Magnets

Author

Zhou, Q.Y. ; Liu, Z. ; Guo, S. ; Yan, A.R. ; Lee, D.

Author_Institution

Key Lab. of Magn. Mater. & Devices, Ningbo Inst. of Mater. Technol. & Eng., Ningbo, China

Volume

51

Issue

11

fYear

2015

Firstpage

1

Lastpage

4

Abstract

A series of Ce_xFe_balB₆ (x = 12, 14, 17, 19, and 23 wt%) ternary ribbons was prepared by melt-spinning. Magnetic properties and the microstructure of the Ce-Fe-B ribbons with different Ce contents were investigated. The X-ray diffraction results indicated that multiphase coexisted in the as-spun Ce-Fe-B ribbons, which contained Ce₂Fe₁₇, CeFe₂, Ce-rich phase, Fe-rich phase, cerium oxide, and iron oxide. The magnetic properties, microstructure, and phase composition of the ribbons were directly affected by the cerium content. The magnetic properties could be obtained by exchange coupling between the hard and soft magnetic phases in the pure ternary Ce-Fe-B ribbons. Furthermore, by heat treatment, the magnetic properties of the as-spun Ce-Fe-B ribbons could be optimized. The highest magnetic properties of H_cj = 6.2 kOe, B_r = 6.9 kGs, and (BH)_m = 8.6 MGOe were obtained in Ce₁₇FebalB₆ magnets.

Keywords

X-ray diffraction; boron alloys; cerium alloys; coercive force; crystal microstructure; exchange interactions (electron); heat treatment; iron alloys; melt spinning; permanent magnets; remanence; soft magnetic materials; Ce_xFeB₆; X-ray diffraction; coercivity; exchange coupling; hard magnetic phase; heat treatment; magnetic energy product; magnetic properties; melt-spun magnets; microstructure; phase composition; remanence; soft magnetic phase; ternary ribbons; Heating; Magnetic properties; Microstructure; Perpendicular magnetic anisotropy; Saturation magnetization; Temperature; Ce-Fe-B magnets; Ce???Fe???B magnets; heat treatment; heat-treatment; magnetic properties; melt-spinning;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2015.2447553

Filename

7128707