Enhanced Magnetic Properties of Sintered Ce–Fe–B-Based Magnets by Optimizing the Microstructure of Strip-Casting Alloys

Author

Changjiang Yan ; Shuai Guo ; Renjie Chen ; Don Lee ; Aru Yan

Author_Institution

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

Volume

50

Issue

11

fYear

2014

fDate

Nov. 2014

Firstpage

1

Lastpage

4

Abstract

We present an effort to enhance the magnetic properties of sintered Ce-Fe-B-based magnets by optimizing the microstructure of strip-casting (SC) alloys. The results indicated the microstructure in the Ce_30.5Fe_bal.B₁ SC alloy was characteristic for peritectic solidification and Ce₂Fe₁₄B coexisted with CeFe₂ and primary Fe-rich phase. After alloying a little amount of Ho and Nd, the microstructure of Ce-Fe-B strip was optimized toward that of Nd-Fe-B strip. Experimental results indicated that all magnetic properties, especially the energy product, were enhanced after optimizing the microstructure of SC alloy. Fracture surface images of the magnets illustrated the grain boundary structure was also modified due to optimization of the microstructure of SC alloys.

Keywords

boron alloys; casting; cerium alloys; fracture mechanics; grain boundaries; iron alloys; remanence; sintering; solidification; Ce₂Fe₁₄B; energy product; enhanced magnetic properties; fracture surface images; grain boundary structure; microstructure; peritectic solidification; primary Fe-rich phase; remanence; sintered Ce-Fe-B-based magnets; strip-casting alloys; Grain boundaries; Magnetic resonance imaging; Metals; Microstructure; Perpendicular magnetic anisotropy; Saturation magnetization; Ce???Fe???B; Nd???Fe???B; magnetic properties; strip casting (SC);

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2014.2325404

Filename

6971414