›› 2014, Vol. 23 ›› Issue (10): 107501-107501.doi: 10.1088/1674-1056/23/10/107501

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

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

严长江a b, 郭帅a b, 陈仁杰a b, 李东a b, 闫阿儒a b   

  1. 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
  • 收稿日期:2013-12-19 修回日期:2014-03-28 出版日期:2014-10-15 发布日期:2014-10-15
  • 基金资助:
    Project supported by the National High Technology Research and Development Program of China (Grant No. 2011AA03A401).

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   

  1. 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
  • Received:2013-12-19 Revised:2014-03-28 Online:2014-10-15 Published:2014-10-15
  • Contact: Yan A-Ru E-mail:aruyan@nimte.ac.cn
  • About author:75.50.Ww
  • Supported by:
    Project supported by the National High Technology Research and Development Program of China (Grant No. 2011AA03A401).

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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 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℃.

关键词: magnetic material, Ce-Fe-B, microstructure, rapid solidification

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℃.

Key words: magnetic material, Ce-Fe-B, microstructure, rapid solidification

中图分类号:  (Permanent magnets)

  • 75.50.Ww