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Chin. Phys. B, 2014, Vol. 23(10): 107501    DOI: 10.1088/1674-1056/23/10/107501
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

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

Yan Chang-Jiang (严长江)a b, Guo Shuai (郭帅)a b, Chen Ren-Jie (陈仁杰)a b, Lee Dong (李东)a b, Yan A-Ru (闫阿儒)a b
a Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China;
b Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
Abstract  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 Ce2Fe14B phase coexists with Fe, Fe2B, and CeFe2 phases in the Ce-Fe-B strips. The eutectic structure 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℃.
Keywords:  magnetic material      Ce-Fe-B      microstructure      rapid solidification  
Received:  19 December 2013      Revised:  28 March 2014      Accepted manuscript online: 
PACS:  75.50.Ww (Permanent magnets)  
Fund: Project supported by the National High Technology Research and Development Program of China (Grant No. 2011AA03A401).
Corresponding Authors:  Yan A-Ru     E-mail:  aruyan@nimte.ac.cn
About author:  75.50.Ww

Cite this article: 

Yan Chang-Jiang (严长江), Guo Shuai (郭帅), Chen Ren-Jie (陈仁杰), Lee Dong (李东), Yan A-Ru (闫阿儒) Phase constitution and microstructure of Ce-Fe-B strip-casting alloy 2014 Chin. Phys. B 23 107501

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