Phase constitution and microstructure of Ce–Fe–B strip-casting alloy

作     者：严长江 郭帅 陈仁杰 李东 闫阿儒 

作者机构：Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Material Technology and EngineeringChinese Academy of Sciences Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology Ningbo Institute of Material Technology and EngineeringChinese Academy of Sciences 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2014年第23卷第10期

页      面：508-512页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 0702[理学-物理学] 

基　　金：Project supported by the National High Technology Research and Development Program of China(Grant No.2011AA03A401) 

主　　题：magnetic material Ce-Fe-B microstructure rapid solidification 

摘      要：The strip-casting technique plays an important role in fabricating high coercivity sintered magnet. In this paper, we investigate the phase constitution and the microstructure of rapidly solidified Ce-Fe-B alloy fabricated by strip-casting. We find that the Ce2FelgB phase coexists with Fe, Fe2B, and CeFe2 phases in the Ce-Fe-B strips. The eutectic stucture consisting of Fe and Fe2B is encased in Ce2Fe14B grains, which is blocked by the CeFe2 grains at triple junctions, indicating that the microstructure of Ce-Fe-B strip is characteristic of a peritectic solidification. Thermal analysis indicates that the large supercooling of Ce2Fe14B results in the residual Fe and Fe2B. The microstructural optimization in Ce-Fe-B strips without Fe and Fe2B could be achieved by a heat treatment of 1000 ℃.