Title :
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
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 Ce30.5Febal.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);
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2014.2325404
