Influence of zirconium addition on microstructure,magnetic properties and thermal stability of nanocrystalline Nd12.3Fe81.7B6.0 alloy
来源期刊：Journal of Rare Earths2009年第5期
论文作者：包小倩 朱洁 李伟 高学绪 周寿增
文章页码：843 - 847
摘 要：Effect of Zr addition on microstructure, magnetic properties and thermal stability of Nd12.3Fe81.7-xZrxB6.0 （x=0-3.0） ribbons melt-spun and annealed was investigated. Magnetic measurement using vibrating sample magnetometer （VSM） revealed that Zr addition was significantly effective in improving the magnetic properties at room temperature. The intrinsic coercivity Hci of the optimally processed ribbons increased monotonically with increasing Zr content, from 751.7 kA/m for x=0 to 1005.3 kA/m for x=3.0. Unlike the coercivity, the remanence polarization Jr increased first with Zr addition, from 0.898 T up to 1.041 T at x=1.5, and then decreased with further Zr addition. The maximum energy product （BH）max behaved similarly, increasing from 103.1 kJ/m3 to a maximum of 175.2 kJ/m3 at x=1.5. Microstructure studies using atomic force microscopy （AFM） and transmission electron microscopy （TEM） had shown a significant microstructure refinement with Zr addition. The absolute values of temperature coefficients of induction and coercivity were significantly increased with increasing Zr content, indicating that Zr was detrimental to thermal stability of the melt-spun Nd2Fe14B-type material.
包小倩1，朱洁1，李伟2，高学绪1，周寿增1
1. State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing2. College of Materials Science and Engineering,Yanshan University
摘 要：Effect of Zr addition on microstructure, magnetic properties and thermal stability of Nd12.3Fe81.7-xZrxB6.0 （x=0-3.0） ribbons melt-spun and annealed was investigated. Magnetic measurement using vibrating sample magnetometer （VSM） revealed that Zr addition was significantly effective in improving the magnetic properties at room temperature. The intrinsic coercivity Hci of the optimally processed ribbons increased monotonically with increasing Zr content, from 751.7 kA/m for x=0 to 1005.3 kA/m for x=3.0. Unlike the coercivity, the remanence polarization Jr increased first with Zr addition, from 0.898 T up to 1.041 T at x=1.5, and then decreased with further Zr addition. The maximum energy product （BH）max behaved similarly, increasing from 103.1 kJ/m3 to a maximum of 175.2 kJ/m3 at x=1.5. Microstructure studies using atomic force microscopy （AFM） and transmission electron microscopy （TEM） had shown a significant microstructure refinement with Zr addition. The absolute values of temperature coefficients of induction and coercivity were significantly increased with increasing Zr content, indicating that Zr was detrimental to thermal stability of the melt-spun Nd2Fe14B-type material.
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