| TbCu7型SmCo7-xHfx合金的结构及磁性能 |
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| 引用本文： | 谢伟诚,陶力,钟明龙,刘仁辉,倪刚,胡贤君,钟震晨. TbCu7型SmCo7-xHfx合金的结构及磁性能[J]. 有色金属科学与工程, 2019, 10(5): 101-105. DOI: 10.13264/j.cnki.ysjskx.2019.05.016 |
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| 作者姓名： | 谢伟诚 陶力 钟明龙 刘仁辉 倪刚 胡贤君 钟震晨 |
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| 作者单位： | 江西理工大学,江西省稀土磁性材料及器件重点实验室,江西 赣州341000;江西理工大学,江西省稀土磁性材料及器件重点实验室,江西 赣州341000;江西理工大学,江西省稀土磁性材料及器件重点实验室,江西 赣州341000;江西理工大学,江西省稀土磁性材料及器件重点实验室,江西 赣州341000;江西理工大学,江西省稀土磁性材料及器件重点实验室,江西 赣州341000;江西理工大学,江西省稀土磁性材料及器件重点实验室,江西 赣州341000;江西理工大学,江西省稀土磁性材料及器件重点实验室,江西 赣州341000 |
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| 基金项目： | 国家自然科学基金资助项目51661011 |
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| 摘 要： | 采用熔体快淬法在40 m/s制备了SmCo7-xHfx （x=0, 0.1, 0.15, 0.2, 0.3）合金薄带，研究Hf取代量对SmCo7-xHfx合金的相组成、组织结构及磁性能的影响.结果表明:随Hf取代量的增加，均可获得TbCu7型结构的亚稳相，晶格常数a和c也随之增加，c/a比值在0.82~0.83，晶粒平均尺寸减小，且更加均匀；在性能方面，Hf取代量为0.2时，可获得最优磁性能Br为0.55 T和Hc为1 084 kA/m. Hf的添加还可有效改善合金高温性能，在27~400 ℃温度区间，矫顽力温度系数由未添加时-0.21 %/℃改善到-0.18 %/℃，提升14.3%.
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| 关 键 词： | SmCo7合金 Hf取代 组织结构 磁性能 |
| 收稿时间： | 2019-05-25 |
Structure and magnetic properties of TbCu7-type SmCo7-xHfx alloys |
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| Affiliation: | Jiangxi Province Key Laboratory for Rare Earth Magnetic Materials and Devices, Jiangxi University of Science and Technology, Ganzhou 341000, China |
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| Abstract: | SmCo7-xHfx (x=0, 0.1, 0.15, 0.2, 0.3) alloy ribbons were prepared by melt-spun at 40 m/s. The phase composition, microstructure and magnetic properties of SmCo7-xHfx alloys were investigated. The results show that, the metastable phase of TbCu7 structure can be obtained with the increasing of Hf substitution, as well as the lattice constants a and c. The c/a ratio is 0.82~0.83, and the grains become finer and uniform. The optimum magnetic properties (Br=0.55 T and Hc=1 084 kA/m) were obtained with x=0.2 Hf substitution. The Hf substitution could also improve the alloy high temperature performance observably. The coercivity temperature coefficient is improved from -0.21 %/℃ to -0.18 %/℃, with a growing range around 14.3%, at the temperature range of 27~400 ℃. |
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