| 高性能各向同性及各向异性Nd-Fe-B/Fe复合磁体的制备 |
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| 引用本文： | 沈倩,马毅龙,陈登明. 高性能各向同性及各向异性Nd-Fe-B/Fe复合磁体的制备[J]. 功能材料, 2011, 0(Z2) |
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| 作者姓名： | 沈倩 马毅龙 陈登明 |
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| 作者单位： | 重庆理工大学材料科学与工程学院;重庆科技学院冶金与材料工程学院; |
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| 摘 要： | 采用将Nd-Fe-B磁粉与Fe粉混合的方法,并结合真空感应热压烧结技术制得高性能的各向同性及各向异性复合磁体。研究了Fe粉含量对热压磁体磁性能的影响,以及温度和压力对磁体致密度和磁性能的影响。结果表明,适量的Fe粉添加(3%,质量分数)可提高热压磁体磁性能;升高温度或提高压力均可大幅提高磁体致密度,但过高的烧结温度使晶粒快速长大,恶化磁体磁性能,而温度过低磁体难易全致密化。在最佳热压温度及压力下制备的热压磁体具有最佳的磁性能:Br=0.852T,Hcj=798kA/m,(BH)m=131.5kJ/m3,磁体密度达7.72g/cm3;热变形后,最大磁能积达331kJ/m3。
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| 关 键 词： | Nd-Fe-B 复合磁体 热压热变形 磁性能 |
Preparation of isotropic and anisotropic Nd-Fe-B/Fe composite magnets with high magnetic properties |
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| SHEN Qian,MA Yi-long,CHEN Deng-ming. Preparation of isotropic and anisotropic Nd-Fe-B/Fe composite magnets with high magnetic properties[J]. Journal of Functional Materials, 2011, 0(Z2) |
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| Authors: | SHEN Qian MA Yi-long CHEN Deng-ming |
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| Affiliation: | SHEN Qian1,MA Yi-long2,CHEN Deng-ming2 (1.College of Materials Science and Engineering,Chongqing University of Technology,Chongqing 400054,China,2.College of Metallurgy and Materials Engineering,Chongqing University of Science and Technology,Chongqing 401331,China) |
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| Abstract: | Bulk isotropic and anisotropic composite magnets were synthesized by blending a Nd-Fe-B powder with an Fe powder using vacuum induction sintering technique.Effects of Fe content,variable sintering temperature and press on the magnetic properties and microstructure of hot-pressed magnets were studied.The result showed that the magnetic properties of hot-pressed magnets could be enhanced by proper addition of Fe powder(3wt.%).The density could be enhanced by increasing sintering temperature or press.However,g... |
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| Keywords: | Nd-Fe-B composite magnets hot-press and hot-deformation magnetic properties |
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