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Study on crystallization behavior and microstructure of melt-spun Nd2(Fe,Nb)14B/α-Fe alloys

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Abstract

The effects of Nb addition on the crystallization behavior, microstructure, and magnetic properties of melt-spun Nd2Fe14B/α-Fe nanocomposite magnets have been studied. The addition of Nb can significantly improve the thermal stability of amorphous phase in as-spun alloys, narrow the range between the onset crystallization temperature and the optimal annealing temperature, restrain the initial formation and growth of α-Fe and Nd2Fe14B. A finer and more homogeneous microstructure can be obtained in the Nb-doped alloy than in the Nb-free alloy. And the Nb addition makes the grains more equiaxed shape. The Nd10Fe83Nb1B6 alloy annealed at 715 °C for 10 min exhibits the improved magnetic properties, B r = 0.90 T, i H c = 750 kA/m, (BH)max = 120 kJ/m3, the intrinsic coercivity and the maximum energy product increase by 25% and 14%, compared with the Nd10Fe84B6 alloy.

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Acknowledgements

This work is financially supported by the Natural Science Foundation of Fujian Province of China (Grant No.E0710005), the Science and Technology Foundation of Fuzhou University (Grant No.2007-XY-01) and the Elitist Foundation of Fuzhou University (Grant No. 0626).

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Authors and Affiliations

  1. College of Materials Science and Engineering, Fuzhou University, Shangjie Town, Fuzhou, 350108, Fujian Province, China

    C. Wang & M. Y. Lan

  2. State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou, 310027, China

    M. Yan

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  1. C. Wang
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  2. M. Y. Lan
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  3. M. Yan
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Correspondence to C. Wang.

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Wang, C., Lan, M.Y. & Yan, M. Study on crystallization behavior and microstructure of melt-spun Nd2(Fe,Nb)14B/α-Fe alloys. J Mater Sci 45, 5637–5641 (2010). https://doi.org/10.1007/s10853-010-4628-8

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  • DOI: https://doi.org/10.1007/s10853-010-4628-8

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