| 压坯密度对烧结NdFeB磁体磁性能的影响 |
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| 引用本文： | 刘国军,赖彬,李家节,朱明刚,李卫.压坯密度对烧结NdFeB磁体磁性能的影响[J].钢铁研究学报,2011,23(7):27-30. |
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| 作者姓名： | 刘国军 赖彬 李家节 朱明刚 李卫 |
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| 作者单位： | 钢铁研究总院功能材料研究所,北京,100081 |
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| 基金项目： | 国家高技术研究发展计划项目(2007AA03Z438); 国家自然科学基金资助项目(50771035,50871032) |
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| 摘 要： | 采用速凝片（SC）、氢破（HD）和气流磨（JM）工艺制备钕铁硼磁粉，研究了压坯密度、烧结温度对磁体取向度、微观结构和磁性能的影响。结果表明：选择合理的压坯密度（ρx=3．4g／cm3）可以使磁体在模压和液相烧结过程中保持较高的取向度，剩磁提高约2％。在低温度（1055℃）烧结时，可以获得较为理想的显微组织，主相晶粒细小...
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| 关 键 词： | 压坯密度 烧结温度 取向度 磁性能 |
Effect of Green Density on Magnetic Properties in Sintered NdFeB Magnet |
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| LIU Guo-jun,LAI Bin,LI Jia-jie,ZHU Ming-gang,LI Wei.Effect of Green Density on Magnetic Properties in Sintered NdFeB Magnet[J].Journal of Iron and Steel Research,2011,23(7):27-30. |
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| Authors: | LIU Guo-jun LAI Bin LI Jia-jie ZHU Ming-gang LI Wei |
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| Affiliation: | LIU Guo-jun,LAI Bin,LI Jia-jie,ZHU Ming-gang,LI Wei(Division of Functional Materials,Central Iron and Steel Research Institute,Beijing 100081,China) |
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| Abstract: | The magnetic powders of sintered NdFeB were prepared by using the strip casting (SC), hydrogen decrepitation and on jet milling (JM) techniques .The effects of green density and sintering temperature on the alignment degree, microstructure and hard magnetic properties were studied. The results show that the optimum green density (ρx=3.4g/cm3) will enable magnets maintain a better alignment in the process of green compact and liquid-phase sintering, and Br increased by 2%. Meanwhile, optimum microstructure was obtained at 1055℃, which show refined matrix phases (grain size about 5.1μm), a reasonable distribution of grain size and there is no abnormal grow grain in sintered magnet, so the excellent magnetic properties have been achieved. |
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| Keywords: | green density sintering temperature alignment degree magnetic property |
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