Structure and magnetic properties of melt-spun Tb0.27Dy0.73Fex ribbons |
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| Authors: | HY Liu YX Li M Zhang XX Meng JP Qu JL Chen GH Wu |
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| Institution: | 1. School of Material Science and Engineering, Hebei University of Technology, Tianjin 300130, PR China;2. State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, PR China |
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| Abstract: | The structure and magnetic properties of the melt-spun ribbons of Tb0.27Dy0.73Fex alloy are investigated as a function of various wheel speeds during melt-quenching using a single-roll technique. It is found that Tb0.27Dy0.73Fex alloy is difficult to be fabricated as amorphous state by using the melt-quenching method. X-ray diffractions show that all these ribbons for x=1.7−2.0 are the MgCu2-type phase at the wheel speed of 45 m s−1. For Tb0.27Dy0.73Fex alloy, the high wheel speed is beneficial to eliminate the RFe3 phase and form the perfect MgCu2-type phase. Compared with the bulk of Tb0.27Dy0.73Fe1.95, these ribbons exhibit higher intrinsic coercivity value and their saturation magnetizations increase as well. The magnetostriction of Tb0.27Dy0.73Fe1.95 composite with 4% epoxy resin is 640×10−6 at 900 kA m−1. |
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| Keywords: | Tb0 27Dy0 73Fex alloy Melt-spun ribbons Melt-quenching Magnetostriction |
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