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Volume 10 Issue 5
Oct.  2019
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XIE Weicheng, TAO Li, ZHONG Minglong, LIU Renhui, NI Gang, HU Xianjun, ZHONG Zhenchen. Structure and magnetic properties of TbCu7-type SmCo7-xHfx alloys[J]. Nonferrous Metals Science and Engineering, 2019, 10(5): 101-105. DOI: 10.13264/j.cnki.ysjskx.2019.05.016
Citation: XIE Weicheng, TAO Li, ZHONG Minglong, LIU Renhui, NI Gang, HU Xianjun, ZHONG Zhenchen. Structure and magnetic properties of TbCu7-type SmCo7-xHfx alloys[J]. Nonferrous Metals Science and Engineering, 2019, 10(5): 101-105. DOI: 10.13264/j.cnki.ysjskx.2019.05.016
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Structure and magnetic properties of TbCu7-type SmCo7-xHfx alloys

  • Jiangxi Province Key Laboratory for Rare Earth Magnetic Materials and Devices, Jiangxi University of Science and Technology, Ganzhou 341000, China

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  • Received Date: May 24, 2019
  • Published Date: October 30, 2019
    Graphical Abstract
    • Abstract
  • SmCo7-xHfx (x=0, 0.1, 0.15, 0.2, 0.3) alloy ribbons were prepared by melt-spun at 40 m/s. The phase composition, microstructure and magnetic properties of SmCo7-xHfx alloys were investigated. The results show that, the metastable phase of TbCu7 structure can be obtained with the increasing of Hf substitution, as well as the lattice constants a and c. The c/a ratio is 0.82~0.83, and the grains become finer and uniform. The optimum magnetic properties (Br=0.55 T and Hc=1 084 kA/m) were obtained with x=0.2 Hf substitution. The Hf substitution could also improve the alloy high temperature performance observably. The coercivity temperature coefficient is improved from -0.21 %/℃ to -0.18 %/℃, with a growing range around 14.3%, at the temperature range of 27~400 ℃.
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