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添加Zr元素對納米復相Nd10．5Fe78．4-xCo5ZrxB6．1粘結永磁體結構和磁性能的影響
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TM273

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國家863計劃基金資助項目（2001AA324030）;四川省杰出青年基金前期項目（03GG009-028）;國家863計劃資助項目（2004AA32G084）


Effect of Zr Addition on Microstructure and Magnetic Properties of Nanocomposite Nd10.5Fe78.4-xCo5ZrxB6.1 (x=0, 1.0, 1.5, 2.0, 2.5) Bonded Magnets
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    摘要:

    采用快淬、熱處理及模壓成形工藝，制備了成分為Nd10．5Fe78．4-xCo5ZrxB6．1（x=0，1．0，1．5，2．0，2．5）的5種粘結永磁體。采用XRD,DTA，TEM等方法對合金的組織結構和晶化行為進行了研究。結果表明：Zr含量的增加可提高材料的非晶形成能力；當Zr添加到一定量時，形成高熔點的Fe2Zr相，產(chǎn)生細化晶粒的作用；添加Zr元素顯著地提高了合金的矯頑力，改善了退磁曲線矩形度，從而提高了最大磁能積。Nd10．5Fe78．4-xCo5ZrxB6．1永磁體在x=2時獲得最佳磁性能，Br=0．659T，Hcj=628kA／m，Hcb=419kA／m，（BH）m=73kJ／m^3。

    Abstract:

    Five kinds of bonded magnets with the compositions (at%) of Nd10.5Fe78.4-xCo5ZrxB6.1 (x= 0, 1.0, 1.5, 2.0, 2.5) were prepared by melt-spinning, post heat treatment and mould pressing. The microstructure and crystallization behavior was studied by X-ray diffraction (XRD), differential thermal analysis (DTA) and transmission electron microscopy (TEM). The results suggest that high Zr concentration can increase the glass formation ability (GFA) of alloys. The Fe2Zr with high melting point forms in the alloys, when the content of Zr is controlled at a certain amount, and it can reduce the grain size. The coercivity and the squareness of demagnetization loop are obviously improved by the addition of Zr, and the energy product is accordingly increased. As a result, the excellent magnetic properties with Br= 0.659 T, Hcj=628 kA/m, Hcb=419 kA/m, (BH)m=73 kJ/m3 are obtained in Nd10.5Fe78.4-xCo5ZrxB6.1 bonded magnet with x=2.

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連利仙 劉穎 高升吉 涂銘旌.添加Zr元素對納米復相Nd10．5Fe78．4-xCo5ZrxB6．1粘結永磁體結構和磁性能的影響[J].稀有金屬材料與工程,2005,34(8):1326~1329.[Lian LiXian;Liu Ying;Gao ShengJi;Tu MingJing. Effect of Zr Addition on Microstructure and Magnetic Properties of Nanocomposite Nd10.5Fe78.4-xCo5ZrxB6.1 (x=0, 1.0, 1.5, 2.0, 2.5) Bonded Magnets[J]. Rare Metal Materials and Engineering,2005,34(8):1326~1329.]
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  • 收稿日期:2003-12-29
  • 最后修改日期:2005-04-11
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