| Effect of Cobalt on HDDR Anisotropic NdFeB |
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| 作者姓名： | 刘旭波 岳明 肖耀福 张正义 王润 |
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| 作者单位： | SchoolofMaterialScience＆Engineering,UniversityofScience＆TechnologyBeijing,Beijing100083,China |
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| 基金项目： | theNationalAdvancedMaterialsCommitteeofChina ( 715 -Z37-0 2 ) |
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| 摘 要： | The effect of cobalt on the magnetic properties and anisotropy of HDDR anisotropic NdFeB was studied.It is found that Co is helpful for preparing anisotropic NdFeB with high coercivity. The research on the initial microstructure for NdFeB alloy indicates that Co tends to enter the crystal lattice of Nd-rich phase and some of Co atoms also enter the crystal lattice of Nd2Fe14B. The dissolution of Co changes the stability of Nd-rich phase and Nd2Fe14 B in H2 atmosphere and affects the kinetics of HDDR phase transformation. As a result, the NdFeB powder exhibits a high coercive force and a strong anisotropy.
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| 关 键 词： | HDDR NdFeB 各向异性 永磁材料 钴 磁性能 稀土 |
Effect of Cobalt on HDDR Anisotropic NdFeB |
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| Liu Xubo,Yue Ming,Xiao Yaofu,Zhang Zhengyi,Wang Run.Effect of Cobalt on HDDR Anisotropic NdFeB[J].Journal of Rare Earths,2002,20(6):579-582. |
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| Authors: | Liu Xubo Yue Ming Xiao Yaofu Zhang Zhengyi Wang Run |
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| Abstract: | The effect of cobalt on the magnetic properties and anisotropy of HDDR anisotropic NdFeB was studied. It is found that Co is helpful for preparing anisotropic NdFeB with high coercivity. The research on the initial microstructure for NdFeB alloy indicates that Co tends to enter the crystal lattice of Nd-rich phase and some of Co atoms also enter the crystal lattice of Nd 2Fe 14B. The dissolution of Co changes the stability of Nd-rich phase and Nd 2Fe 14B in H 2 atmosphere and affects the kinetics of HDDR phase transformation. As a result, the NdFeB powder exhibits a high coercive force and a strong anisotropy. |
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| Keywords: | rare earths Co HDDR NdFeB anisotropy |
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