| Investigation on Hard Magnetic Properties of Nanocomposite Permanent Magnets with Precipitate-Typed Microstructure by Micromagnetic Finite-Element Methods |
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| 作者姓名： | 张宏伟 荣传兵 杜晓波 张绍英 沈保根 |
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| 作者单位： | State Key Laboratory of Magnetism，State Key Laboratory of Magnetism，State Key Laboratory of Magnetism，State Key Laboratory of Magnetism，State Key Laboratory of Magnetism Institute of Physics and Centre for Condensed Matter Physics，Chinese Academy of Sciences，Beijing 100080，China，Institute of Physics and Centre for Condensed Matter Physics，Chinese Academy of Sciences，Beijing 100080，China，Institute of Physics and Centre for Condensed Matter Physics，Chinese Academy of Sciences，Beijing 100080，China，Institute of Physics and Centre for Condensed Matter Physics，Chinese Academy of Sciences，Beijing 100080，China，Institute of Physics and Centre for Condensed Matter Physics，Chinese Academy of Sciences，Beijing 100080，China |
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| 摘 要： | Maximumenergyproduct (BH) maxisakeychar acteristicofapermanentmagnet (PM ) .Theoptimal(BH) maxislimitedbythevalueofJr2 / 4 μ0 (Jrrema nence)correspondingtoanidealrectangularhysteresisloopwhencoercivityμ0 HcisatleastlargerthanJr/ 2 .FormostrareearthPM ,thecoercivityisfarlargerthantheremanence1,2 ] .Thus ,remanenceenhance mentbecomesanimportantroleindeveloping(BH) max.Sincehighremanencewasfoundinisotrop icnanostructuredPM ,muchefforthasbeenpaidtoachievehighperformancePM3,4 ] .Thehigh…
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| 关 键 词： | 硬磁性能 永磁材料 显微结构 有限元 数值模拟 稀土 |
Investigation on Hard Magnetic Properties of Nanocomposite Permanent Magnets with Precipitate-Typed Microstructure by Micromagnetic Finite-Element Methods |
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| Zhang Hongwei,Rong Chuanbing,Du Xiaobo,Zhang Shaoying,Shen Baogen.Investigation on Hard Magnetic Properties of Nanocomposite Permanent Magnets with Precipitate-Typed Microstructure by Micromagnetic Finite-Element Methods[J].Journal of Rare Earths,2004,22(1):157-160. |
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| Authors: | Zhang Hongwei Rong Chuanbing Du Xiaobo Zhang Shaoying Shen Baogen |
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| Affiliation: | Zhang Hongwei*,Rong Chuanbing,Du Xiaobo,Zhang Shaoying,Shen Baogen |
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| Abstract: | The demagnetization curves were calculated using micromagnetic finite-element method for nanocomposite Pr2Fe14B/α-Fe permanent magnets with precipitate-typed microstructure. Due to intergrain exchange coupling, both remanence enhancement and a single magnetic phase behavior in demagnetization curve were found. For the samples with the hard phase as the precipitate and the soft one as the matrix, a coercivity μ0Hc of 0.78 T, a remanence Jr of 1.18 T and a large energy product(BH)max of 200 kJ·m-3 are obtained for the sample with hard grain size being 23 nm. While, for the sample with the soft phase as the precipitate, μ0Hc of 0.95 T, Jr of 1.24 T and(BH)max of 240 kJ·m-3 are obtained for the sample with soft grain size being 10 nm. The calculating results were compared with the experimental Pr8Fe87B5 ribbons. The dependence of remanence and coercivity on the microstructure was discussed extensively. |
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| Keywords: | micromagnetic finite element method rare earths |
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