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Annealing Effects on Microstructure and Magnetic Properties of (NdPr)9.5(FeNbCoCu)79.5(BC)11 Nanocomposite Magnets

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Abstract

Annealing effects on microstructure and magnetic properties of (NdPr)9.5(FeNbCo)79.5(BC)11 ribbons were investigated. It was observed that Nd2Fe14B and Fe3B phases were directly formed at low spinning speed. Then, the alloys transformed to an amorphous state at a speed of 20 m/s. Annealed at 700 ∘C for 10 min, the amorphous alloys as-quenched at 20 m/s crystallized into a nanocomposite composed of Nd2Fe14B and \(\alpha \)-Fe phases. The formation of Fe3B phases was inhibited. The magnetic properties firstly increased and then decreased with the increasing of annealing time. The optimum magnetic properties were achieved in the alloys annealed at 700 ∘C for 10 min. The corresponding coercivity, remanence, and the maximum energy product was 427.5 kA/m, 0.94 T, and 101.2 kJ/m3, respectively. In addition, fine and uniform grains were formed. The average grain size was 10 nm.

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Funding

This study was supported by the National Natural Science Foundation of China under Grant No. 51174030.

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Authors and Affiliations

  1. Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China

    Fang Yang & ZhiMeng Guo

  2. Tianjin Sanhuan Lucky New Materials, Inc., Tianjin, 300457, China

    GuangLe Dong

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

    YanLi Sui

Authors
  1. Fang Yang
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  2. GuangLe Dong
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  3. ZhiMeng Guo
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  4. YanLi Sui
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Correspondence to Fang Yang.

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Yang, F., Dong, G., Guo, Z. et al. Annealing Effects on Microstructure and Magnetic Properties of (NdPr)9.5(FeNbCoCu)79.5(BC)11 Nanocomposite Magnets. J Supercond Nov Magn 32, 493–498 (2019). https://doi.org/10.1007/s10948-018-4744-2

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  • DOI: https://doi.org/10.1007/s10948-018-4744-2

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