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Microstructure refinement and magnetic properties enhancement of nanocrystalline Nd12.3Fe81.7B6.0 ribbons by addition of Zr

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Abstract

Effects of Zr addition and annealing treatment on the formation, microstructure and magnetic properties of Nd12.3Fe81.7−x Zr x B6.0 (x=0−3.0) ribbons melt-spun and annealed have been systematically investigated by means of vibrating sample magnetometer (VSM), differential scanning calorimeter (DSC), X-ray diffraction (XRD), and high resolution scanning electron microscopy (HRSEM). Phase analysis reveals that Nd2Fe14B is single-phase material. It has been found that the intrinsic coercivity H ci of the optimally processed Nd12.3Fe81.7−x Zr x B6.0 ribbons increases monotonically from 751.7 kA/m for x=0 to 1005.3 kA/m for x=3.0. The remanence polarization J r and maximum energy product (BH)max increase first with Zr addition, then slightly decrease with further increasing Zr content. Optimum magnetic properties with J r=1.041 T, H ci=887.5 kA/m and (BH)max=175.2 kJ/m3 have been achieved for the ribbons with x=1.5. The significant improvement of magnetic properties originates from the finer grains of the ribbons by introducing Zr.

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Authors and Affiliations

  1. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, China

    XiaoQian Bao, Yi Qiao, XueXu Gao, Jie Zhu & ShouZeng Zhou

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  1. XiaoQian Bao
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  2. Yi Qiao
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  3. XueXu Gao
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  4. Jie Zhu
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Correspondence to XiaoQian Bao.

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Bao, X., Qiao, Y., Gao, X. et al. Microstructure refinement and magnetic properties enhancement of nanocrystalline Nd12.3Fe81.7B6.0 ribbons by addition of Zr. Sci. China Ser. E-Technol. Sci. 52, 1891–1896 (2009). https://doi.org/10.1007/s11431-009-0131-3

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  • DOI: https://doi.org/10.1007/s11431-009-0131-3

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