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添加Dy在快淬NdFeB永磁体中的作用

张 然 刘 颖 高升吉 谢 治 涂铭旌

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添加Dy在快淬NdFeB永磁体中的作用

张 然, 刘 颖, 高升吉, 谢 治, 涂铭旌

Role of Dy addition in rapid-quenched NdFeB permanent magnets

Zhang Ran, Liu Ying, Gao Sheng-Ji, Xie Zhi, Tu Ming-Jing
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  • 在之前研究Nb元素的添加对快淬(Nd,Dy)11.5Fe82.4-mNbmB6.1永磁体磁性能、温度特性及显微组织影响的基础上,进一步研究了Dy元素在Nd11.5-nDynFe81.4Nb1B6.1 (n=0,0.5,1,1.5,2)永磁体中
    Following the previous study on the effect of Nb addition in rapid-quenched (Nd,Dy)11.5Fe82.4-mNbmB6.1 permanent magnets on the magnetic properties, temperature characteristics and microstructure, the role of Dy addition in rapid-quenched Nd11.5-nDynFe81.4Nb1B6.1 (n=0,0.5,1,1.5,2) permanent magnets has been investigated. It was found that Hci increases with increasing Dy content and the irreversible loss of magnetic flux decreases. Dy addition results in smaller grains and more homogeneous and regular grain structure. It is considered that Dy addition may enhance exchange coupling pining field and reduce the internal stray magnetic field. As a result, the irreversible loss of magnetic flux decreases notably and the magnetic properties at higher temperature are improved. Dy atoms on entering the main lattice of Nd9.5Dy2Fe81.4Nb1B6.1 alloy cause crystal lattice distorsion and affect the local structure of Fe atoms; however, Dy atoms have little influence of the local structure of Nd atoms.
    • 基金项目: 国家高技术研究发展(863)计划项目(批准号:2004AA32G084)、教育部新世纪优秀人才计划项目(批准号:NCET-04-0873)、四川省重大科技攻关项目(批准号:03GG009-006)、四川省杰出青年科技基金(批准号:03ZQ026-006)资助的课题.
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  • 文章访问数:  7686
  • PDF下载量:  1226
  • 被引次数: 0
出版历程
  • 收稿日期:  2007-03-17
  • 修回日期:  2007-05-17
  • 刊出日期:  2008-01-15

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