| 纳米晶复合NdFeCoZrB永磁合金磁性能和温度稳定性的研究 |
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| 引用本文： | 张士岩,徐晖.纳米晶复合NdFeCoZrB永磁合金磁性能和温度稳定性的研究[J].热加工工艺,2009,38(20). |
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| 作者姓名： | 张士岩 徐晖 |
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| 作者单位： | 1. 上海日港置信非晶体金属有限公司,上海,200335
2. 上海大学材料研究所,上海,200072 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 利用熔体快淬法和品化退火工艺制备了纳米晶复合NdFeB永磁粘结磁体,研究了添加Zr元素对磁体室温磁性能和温度稳定性的影响.结果表明,添加3at%Zr元素能明显提高磁体的矫顽力和最大磁能积.在淬速18 m/s、退火温度640℃下制备的Nd_(9.5_Fe_(76)Co_5Zr_3B_(6.5)粘结磁体具有良好的综合磁性能,即剩磁为0.71 T,矫顽力为652 kA/m,最大磁能积为80kJ/m~3.适量添加Zr元素可以有效改善磁体的温度稳定性,在20～150℃,纳米晶复合Nd_95Fe_(76)Co_5Zr_3B_(6.5)粘结磁体的剩磁温度系数为-0.13%/℃,内禀矫顽力温度系数为-0.35%/℃;在150℃时效100h后,不可逆磁通损失为-4.50%.
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| 关 键 词： | 纳米复合 永磁体 磁性能 温度稳定性 |
Study on Magnetic Properties and Temperature Stability of Nano-composite NdFeCoZrB Magnets |
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| ZHANG Shiyan,XU Hui.Study on Magnetic Properties and Temperature Stability of Nano-composite NdFeCoZrB Magnets[J].Hot Working Technology,2009,38(20). |
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| Authors: | ZHANG Shiyan XU Hui |
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| Abstract: | The influence of Zr addition on magnetic properties and temperature stability of nano-composite NdFeB bonded magnets were investigated. The results show that room temperature magnetic properties are remarkably improved by the additon of Zr. The optimal magnetic properties of J_r=0.71 T,_i H_c=652 kA/m and (BH)_(max)=80 kJ/m~3 are obtained for 3at% addition of Zr element. Proper additions of Zr can improve the temperature stability of magnet. The temperature coefficient of remanence and coercivity of nano-composites Nd_(9.5)Fe_(76)Co_5Zr_3B_(6.5) bonded magnets is -0.13%/℃ and -0.35%/℃, respectively, at 20～ 150℃. The irreversible loss can reach -4.5%, when aging at 150℃ for 100 h. |
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| Keywords: | NdFeB nano-composite NdFcB permanent magnet magnetic properties temperature stability |
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