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首页> 外文期刊>Journal of rare earths >Effect of Zirconium Content on Microstructure and Magnetic Properties of Nanocomposite Bonded Magnets
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Effect of Zirconium Content on Microstructure and Magnetic Properties of Nanocomposite Bonded Magnets

机译：锆含量对纳米复合粘结磁体组织和磁性能的影响

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摘要

Five kinds of bonded magnets with compositions of Nd_(10.5)Fe_(78.4-x)Co_5Zr_xB_(6.1) (atom percentage x =0,1.0, 1.5,2.0,2.5) were prepared by rapid quenching, post heat treatment and mould-pressing. The microstructure and crystallization behavior were studied by X-ray diffraction (XRD), differential thermal analysis (DTA) and atomic force microscopy (AFM). The results suggest that high content of Zr can increase the glass formation ability (GFA) of alloys. When the content of Zr is controlled at a certain level, Fe_2Zr with high melting point is formed in the alloys, and grain size is reduced consequently. At the same time, because of Zr addition, the coercivity and squareness of demagnetization loop are obviously improved, and the energy product is accordingly increased. As a result, optimal magnetic properties of Nd_(10.5)Fe_(78.4-x)Co_5Zr-xB_(6.1)(B_r=0.659 T,H_(cj) =628 kA • m~(-1),H_(cb) =419 kA • m~(-1), (BH)_m = 73 kJ • m~(-3)) are obtained when x =2.
机译：通过快速淬火，后热处理和压模制备了五种组成为Nd_（10.5）Fe_（78.4-x）Co_5Zr_xB_（6.1）（原子百分比x = 0,1.0，1.5,2.0,2.5）的粘结磁体。通过X射线衍射（XRD），差热分析（​​DTA）和原子力显微镜（AFM）研究了组织和结晶行为。结果表明，高含量的Zr可以提高合金的玻璃形成能力（GFA）。当将Zr的含量控制在一定水平时，在合金中形成具有高熔点的Fe_2Zr，因此晶粒尺寸减小。同时，由于添加了Zr，消磁回路的矫顽力和矩形度明显提高，能量积相应增加。结果，Nd_（10.5）Fe_（78.4-x）Co_5Zr-xB_（6.1）（B_r = 0.659 T，H_（cj）= 628 kA•m〜（-1），H_（cb）=当x = 2时，获得419 kA•m〜（-1），（BH）_m = 73 kJ•m〜（-3））。

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