| Nb含量对烧结NbFeB永磁体磁性能及显微结构的影响 |
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| 引用本文： | 成问好,李卫,李传健.Nb含量对烧结NbFeB永磁体磁性能及显微结构的影响[J].物理学报,2001,50(1):139-143. |
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| 作者姓名： | 成问好 李卫 李传健 |
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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： | 国家自然科学基金(批准号：50071051)资助的课题.
Project supported by the National Natural Science Foundation of China (Grant No.50071051). |
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| 摘 要： | 关键词：
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| 关 键 词： | NDFEB NDFENBB 稀土永磁材料 显微结构 烧结 |
| 修稿时间： | 2000年6月22日 |
INVESTIGATIONS ON THE
MAGNETIC PROPERTIES AND MICROSTRUCTURES OF SINTERED NdFeB MAGNETS WITH DIFFERENT Nb
ADDITIONS |
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| CHENG WEN-HAO,LI WEI,LI Chuan-jian.INVESTIGATIONS ON THE
MAGNETIC PROPERTIES AND MICROSTRUCTURES OF SINTERED NdFeB MAGNETS WITH DIFFERENT Nb
ADDITIONS[J].Acta Physica Sinica,2001,50(1):139-143. |
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| Authors: | CHENG WEN-HAO LI WEI LI Chuan-jian |
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| Abstract: | The magnetic properties and microstructures of a series of sintered magnets Nd33.0Fe65.9-xNbxB1.1(wt%,x=0,0.3,0.6,1.0,1.5,2.0) as well as their relations were investigated in detail. It was found that the grain size of NdFeB magnet without Nb addition was quiet different from each other and the shape of the grains was very irregular, which led to the deterioration of the magnetic properties. The microstructures of the magnets with proper Nb addition became homogeneous and the final size of the grain after annealing was very fine, and, correspondingly, the density of the final magnet was increased to a higher level. Magnetic measurements showed that the coercivity iHc, magnetic remanence Br and energy product (BH)max of the magnet with Nb additions below 1.0wt% were generally higher than those of their Nb-free counterparts. The effect of Nb on the magnetic properties originated mainly from the homogenization of the microstructure due to Nb addition. |
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| Keywords: | NdFeB NdFeNbB permanent magnets microstructures |
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