Dependence of macromagnetic properties on the microstructure in high-performance Sm2Co17-type permanent magnets
Dependence of macromagnetic properties on the microstructure in high-performance Sm2Co17-type permanent magnets
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高性能Sm2Co17型永磁体宏观磁性能对微观结构的依赖性
DOI：
10.1016/j.jmmm.2020.166942
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发表时间：
2020-09
影响因子：
2.7
通讯作者：
George C. Hadjipanayis
中科院分区：
文献类型：
--
作者：
Shuai Wang;Yikun Fang;Chao Wang;Lei Wang;Minggang Zhu;Wei Li;George C. Hadjipanayis
高性能Sm 2Co 17型永磁体的显微组织特性对获得高内禀矫顽力（Hcj）和大拐点磁场（Hknee）具有重要意义。本文系统地研究了微结构与磁性能之间的关系。通过调整时效温度和优化Zr含量两种方法获得了不同的显微组织。一方面，随着时效温度从1063 K升高到1103 K，晶胞尺寸和片层相密度分别从75.1 nm和0.014 l/nm增加到101.5 nm和0.043 l/nm，晶胞边界处的平均峰值Cu浓度达到21.9 at%，这有助于获得较高的Hcj和Hknee。随着时效温度进一步升高到1143 K，更大的晶胞尺寸和不完整的晶胞边界导致晶胞边界处Cu浓度的不规则分布。在这种情况下，即使磁体显示出高的Hcj，Hkee也是低的。另一方面，Zr含量的增加也促进了片层相密度和胞边界处的平均峰值Cu浓度的增加，从而引起高的Hcj和Hknee。考虑到时效温度和Zr含量，可以得出结论，较低的时效温度和较低的Zr含量产生较低的片层相密度和在晶胞边界处的平均Cu浓度，这导致较低的Hcj和Hkee的磁体。为了进一步证实微观结构和磁性能之间的这种相关性，将Sm（CobalCu0.062Fe0.285Zr0.016）7.6的磁体在1143 K的较高温度下老化以增加层状相密度。正如预期的那样，层状相密度从0.008增加到0.013 1/nm;然而，晶胞尺寸同时从142.5增加到247 nm。磁体在单元边界处表现出高得多但不均匀的Cu浓度。结果表明，Hcj从1.64增加到10.18 kOe，而Hkee仅从1.09增加到3.91 kOe。
Microstructure characteristics are important for the high-performance Sm2Co17-type permanent magnets to achieve high intrinsic coercivity (Hcj) and large magnetic field at the knee-point (Hknee). In this work, the correlation between microstructures and magnetic properties has been systematically studied. The different microstructures were obtained by two procedures: by adjusting the aging temperature and optimizing the Zr content. On one hand, with increase of aging temperature from 1063 K to 1103 K, the cell size and the lamellar phase density increase from 75.1 nm and 0.014 1/nm to 101.5 nm and 0.043 1/nm, respectively, and the average peak Cu concentration at the cell boundaries reaches 21.9 at% which is helpful for obtaining relatively highHcjandHknee. As the aging temperature increases further to 1143 K, a much larger cell size and with incomplete cell boundaries results in an irregular distribution of Cu concentration at the cell boundaries. In this case, theHkneeis low even though the magnet shows a highHcj. On the other hand, the increase of Zr content also promotes an increase in both the lamellar phase density and the average peak Cu concentration at the cell boundaries, giving rise to highHcjandHknee. Taking into consideration the aging temperature and Zr content, one can conclude that a lower aging temperature and lower Zr content produce a lower lamellar phase density and average Cu concentration at the cell boundaries and this leads to a lowerHcjandHkneeof the magnets. To further confirm this correlation between the microstructures and magnetic properties, a magnet of Sm(CobalCu0.062Fe0.285Zr0.016)7.6was aged at a higher temperature of 1143 K to increase the lamellar phase density. As expected, the lamellar phase density increases from 0.008 to 0.013 1/nm; however, the cell size increases simultaneously from 142.5 to 247 nm. The magnet exhibits a much higher but uneven Cu concentration at the cell boundaries. As a result, theHcjincreases from 1.64 to 10.18 kOe, whileHkneejust increases from 1.09 to 3.91 kOe.
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Fe含量对Sm2Co17型烧结磁体磁性能的影响机制：显微组织和微观化学
影响因子：
6.2
作者：
Yu Nengjun;Gao Wuyi;Pan Minxiang;Yang Hangfu;Wu Qiong;Zhang Pengyue;Ge Hongliang
通讯作者：
Ge Hongliang
影响因子：
6
作者：
X. Zhiqin;L. Liu;Zhuang Liu;M. Li;Don Lee;R. Chen;Y. Guo;A. Yan
通讯作者：
X. Zhiqin;L. Liu;Zhuang Liu;M. Li;Don Lee;R. Chen;Y. Guo;A. Yan
DOI：
10.1109/20.908776
发表时间：
2000-09
期刊：
--
影响因子：
--
作者：
S. Liu;G. Potts;G. Doyle;Jie Yang;G. E. Kuhl;Christina H Chen;M. Walmer;M. Walmer
通讯作者：
S. Liu;G. Potts;G. Doyle;Jie Yang;G. E. Kuhl;Christina H Chen;M. Walmer;M. Walmer
Zr对Sm(CobalFe0.09Cuo.o9Zrx)(7.68)磁体磁性能和电阻率的影响
影响因子：
6.2
作者：
Li Tianyi;Liu Zhuang;Feng Yanping;Liu Lei;Zhang Chaoyue;Yan Guanghui;Feng Zaixin;Lee Don;Yan Aru
通讯作者：
Yan Aru
影响因子：
16.6
作者：
Duerrschnabel M;Yi M;Uestuener K;Liesegang M;Katter M;Kleebe HJ;Xu B;Gutfleisch O;Molina-Luna L
通讯作者：
Molina-Luna L