| 添加Nb对Nd-Fe-B铸态合金组织及磁体磁性能的影响 |
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| 引用本文： | 成问好,李卫,李传健,李岫梅.添加Nb对Nd-Fe-B铸态合金组织及磁体磁性能的影响[J].磁性材料及器件,2001,32(1):1-4. |
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| 作者姓名： | 成问好 李卫 李传健 李岫梅 |
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| 作者单位： | 钢铁研究总院功能材料研究所, |
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| 摘 要： | 对添加Nb的Nd-Fe-B铸态合金的结晶状态、磁体的显微组织形貌、磁性能等进行了详细研究。研究发现：添加Nb使Nd-Fe-B铸态合金的片状晶尺寸明显变小，Nd-Fe-B磁粉的抗氧化性能提高，磁体的晶粒结构均匀一致，不含Nb的Nd-Fe-B磁体晶粒的大小、形状差异非常大，其显著微结构出一种类似“闭窝”状的结构。这种结构使Nd-Fe-B磁体的磁性能恶化。添加一定量的Nb元素后，这种“团窝”状结构消失，磁体的晶粒更加规则，组织结构晚加均匀。采用常规的湿法制粉工艺，用Nb含量（摩尔分数）为0．44％的Nd-Fe-B合金得到了（BH）max为336kJ/m^3(42.1MGOe)的烧结磁体，而相同成分的不含Nb磁体的最大磁能积吸194kJ/m^3。
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| 关 键 词： | Nd－Fe－B 磁性能 铌 稀土永磁材料 铸态合金 磁体 |
| 文章编号： | 1001-3830（2001）01-0001-04 |
| 修稿时间： | 2000年9月15日 |
Effect of Nb Addition on Microstructures of As-cast Alloys and Magnetic Properties of Nd-Fe-B Sintered Magnets |
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| CHENG WEN-HAO,LI Wei,LI Chuan-jian,Li Xiu-mei.Effect of Nb Addition on Microstructures of As-cast Alloys and Magnetic Properties of Nd-Fe-B Sintered Magnets[J].Journal of Magnetic Materials and Devices,2001,32(1):1-4. |
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| Authors: | CHENG WEN-HAO LI Wei LI Chuan-jian Li Xiu-mei |
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| Abstract: | In this work the effect of Nb addition on the microstructures of Nd-Fe-B as-cast alloys and the magnetic properties of anisotropic Nd-Fe-B sintered magnets were investigated in detail． Experiments revealed that the size of the plate-like grains of Nd-Fe-B as-cast alloys could be drastically decreased and the grain shape of the sintered magnets could be markedly regularized by Nb addition， and thus the magnetic properties of the magnets were improved． As a result， magnet with the magnetic property of （BH）max＝336kJ／m3（42．1MGOe） was obtained by conventional wet process with 0．44at％Nb containing alloy． |
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| Keywords: | Nd-Fe-B Nb addition microstructure magnetic properties |
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