| Phase constitution and microstructure of Ce–Fe–B strip-casting alloy |
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| 作者姓名： | 严长江 郭帅 陈仁杰 李东 闫阿儒 |
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| 作者单位： | Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Material Technology and Engineering,Chinese Academy of Sciences;Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Material Technology and Engineering,Chinese Academy of Sciences |
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| 基金项目： | 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 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 ℃.
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| 关 键 词： | 显微组织 铸造合金 相组成 Fe2B 微观结构 高矫顽力 热分析 热处理 |
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