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首页> 外文期刊>Journal of magnetism and magnetic materials >Dependence of macromagnetic properties on the microstructure in high-performance Sm_2Co_(17)-type permanent magnets
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Dependence of macromagnetic properties on the microstructure in high-performance Sm_2Co_(17)-type permanent magnets

机译：大分子特性对高性能SM_2CO_（17）型永磁体的微观结构的依赖性

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摘要

Microstructure characteristics are important for the high-performance Sm_2Co_(17)-type permanent magnets to achieve high intrinsic coercivity (H_(cj)) and large magnetic field at the knee-point (H_(knee)). In this work, the correlation between microstructures and magnetic properties has been systematically studied. The different mi-crostructures 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 run and 0.014 1m to 101.5 nm and 0.043 1m, respectively, and the average peak Cu concentration at the cell boundaries reaches 21.9 at% which is helpful for obtaining relatively high H_(cj) and H_(knee). 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, the H_(knee) is low even though the magnet shows a high H_(cj). 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 high H_(cj) and H_(knee). 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 lower H_(cj) and H_(knee) of the magnets. To further confirm this correlation between the microstructures and magnetic properties, a magnet of Sm (Co_(bai)Cu_(0.062)Fe_(0.285)Zr_(0.016))_(7.6) was 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 1m; 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, the H_(cj) increases from 1.64 to 10.18 kOe, while H_(knee) just increases from 1.09 to 3.91 kOe.
机译：微结构特性对于高性能SM_2CO_（17） - 型永磁体非常重要，以实现高固有矫顽力（H_（CJ））和膝关节（H_（膝））的大磁场）。在这项工作中，系统地研究了微观结构和磁性性质之间的相关性。通过两种方法获得不同的Mi-Crostructure：通过调节老化温度并优化Zr含量。一方面，随着1063 k至1103k的衰老温度的增加，电池尺寸和层状相密度分别从75.1次运行和0.0141 / nm至101.5nm和0.0431 / nm的增加，并且平均峰Cu浓度在细胞边界处达到21.9，％是有助于获得相对高的H_（CJ）和H_（膝关节）。随着老化温度进一步增加至1143k，细胞尺寸更大，细胞界限具有更大的细胞尺寸，导致细胞界限在Cu浓度的不规则分布。在这种情况下，即使磁体显示出高H_（CJ），H_（膝盖）也很低。另一方面，Zr含量的增加还促进了细胞界限下的层状相密度和平均峰Cu浓度的增加，从而产生高H_（CJ）和H_（膝关节）。考虑到衰老温度和Zr含量，可以得出结论，较低的老化温度和较低的Zr含量在细胞界限处产生较低的层状相密度和平均Cu浓度，这导致下部H_（CJ）和H_（膝盖） ）磁铁。为了进一步确认微结构和磁性之间的这种相关性，SM的磁体（CO_（Bai）Cu_（0.062）Fe_（0.285）Zr_（0.016）在1143k的较高温度下老化以增加层状相密度。如所预期的那样，层状相密度从0.008增加到0.013 1 / nm;然而，电池尺寸同时从142.5增加到247nm。磁体在细胞界限处表现出更高但不均匀的Cu浓度。结果，H_（CJ）从1.64到10.18 KOE增加，而H_（膝盖）刚从1.09增加到3.91 koe。

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  • 来源
    《Journal of magnetism and magnetic materials》 |2020年第9期|166942.1-166942.10|共10页
  • 作者

    Shuai Wang; Yikun Fang; Chao Wang; Lei Wang; Minggang Zhu; Wei Li; George C. Hadjipanayis;

  • 作者单位

    Division of Functional Materials Research Central Iron and Steel Research Institute Beijing 100081 China;

    Division of Functional Materials Research Central Iron and Steel Research Institute Beijing 100081 China;

    Division of Functional Materials Research Central Iron and Steel Research Institute Beijing 100081 China;

    Division of Functional Materials Research Central Iron and Steel Research Institute Beijing 100081 China;

    Division of Functional Materials Research Central Iron and Steel Research Institute Beijing 100081 China;

    Division of Functional Materials Research Central Iron and Steel Research Institute Beijing 100081 China;

    Department of Physics and Astronomy Sharp Lab University of Delaware Newark DE 19716 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Sm-Co permanent magnets; Microstructures; Magnetic properties; Aging temperature; Zr content;

    机译：SM-CO永磁磁铁;微观结构;磁性;老化温度;ZR内容;

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