| 添加Si3N4对烧结NdFeB的磁性能及抗腐蚀性能的影响 |
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| 引用本文： | 莫文剑,张澜庭,陈亮,单爱党,吴建生.添加Si3N4对烧结NdFeB的磁性能及抗腐蚀性能的影响[J].中国稀土学报,2007,25(5):588-591. |
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| 作者姓名： | 莫文剑 张澜庭 陈亮 单爱党 吴建生 |
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| 作者单位： | 上海交通大学材料科学与工程学院教育部高温材料及开放实验室,上海,200030 |
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| 摘 要： | 针对在提高NdFeB永磁材料耐蚀性时出现磁性能下降的问题,研究了通过混粉的方式添加Si3N4对烧结NdFeB磁体磁性能和耐腐蚀性的影响。研究结果表明,添加适量Si3N4可实现在磁体剩磁和最大磁能积提高的基础上,提高材料的腐蚀电位,并且在极化曲线的阳极部分相同电位条件下,具有较小的极化电流密度,从而达到改善NdFeB磁体耐腐蚀性的目的。
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| 关 键 词： | NdFeB磁体 磁性能 抗腐蚀性能 稀土 |
| 文章编号： | 1000-4343（2007）05-0588-04 |
| 修稿时间： | 2006-12-30 |
Effects of Si3N4 on Magnetic Properties and Corrosion Resistance of Sintered NdFeB |
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| Mo Wenjian,Zhang Lanting,Chen Liang,Shan Aidang,Wu Jiansheng.Effects of Si3N4 on Magnetic Properties and Corrosion Resistance of Sintered NdFeB[J].Journal of the Chinese Rare Earth Society,2007,25(5):588-591. |
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| Authors: | Mo Wenjian Zhang Lanting Chen Liang Shan Aidang Wu Jiansheng |
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| Institution: | Key Laboratory of Ministry of Education for High Temperature Materials and Testing, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, China |
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| Abstract: | Si3N4 was added into the sintered NdFeB magnets in order to improve their magnetic properties and corrosion resistance.It was found that both remanence and maximum energy product were increased at minor additives,and coercitivity was almost invariable.Furthermore,corrosion potential of magnets with Si3N4 additives was more positive,and the magnets had lower polarization current density under the same applied potential in the anodic branch of the polarization curve than that of magnet without additives,which indicated that intergranular addition of Si3N4 could improve corrosion resistance of NdFeB magnets. |
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| Keywords: | NdFeB Magnets magnetic properties corrosion resistance rare earths |
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