Effects of solution temperature and Cu content on the properties and microstructure of 2: 17-type SmCo magnets
Effects of solution temperature and Cu content on the properties and microstructure of 2: 17-type SmCo magnets
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固溶温度和Cu含量对2:17型SmCo磁体性能和显微组织的影响
DOI：
10.1016/j.jallcom.2017.11.009
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发表时间：
2018
影响因子：
6.2
通讯作者：
Jiang CB
中科院分区：
文献类型：
--
作者：
Zhang T. L.;Song Q.;Wang H.;Wang J. M.;Liu J. H.;Jiang C. B.;Jiang CB
系统研究了固溶温度和Cu含量对Sm（CobalFe 0.21CuxZr 0.03）7.6（x= 0.06，0.08，0.10）永磁材料性能和显微组织的影响。结果表明，TbCu 7合金经最佳温度固溶处理后，可获得单相TbCu 7合金。Sm（CobalFe0.21Cu0.08Zr0.03）7.6在1478 K固溶处理后，其最佳磁性能为Br = 1.010 T，（BH）max= 190.2 kJ/m3。在较低的固溶温度下，富钴FeCoZr相被监测到，并观察到一个“台阶”的退磁曲线老化样品。在较高固溶温度下，基体逐渐发生成分偏析，出现富Zr的SmCoZr相;而在较高固溶温度下，Cu含量过高时，析出相仍为FeCoZr相，导致剩磁变差。上述变化均与细胞结构有关。
The effects of solution temperature and Cu content on the properties and microstructure of Sm (CobalFe0.21CuxZr0.03)7.6(x= 0.06, 0.08, 0.10) permanent magnets were investigated systematically. The results showed that TbCu7single-phase was obtained after solution treatment at optimum temperature. The best magnetic properties of Br = 1.010 T and (BH)max= 190.2 kJ/m3were obtained for Sm (CobalFe0.21Cu0.08Zr0.03)7.6by a proper solution treatment at 1478 K. At a lower solution temperature, the Co-rich FeCoZr phase was monitored, and a “step” was observed in the demagnetization curves of aged samples. At a higher solution temperature, composition segregation of the matrix gradually occurs, and a Zr-rich SmCoZr phase was found. However, at a slightly higher solution temperature with superabundant Cu, the precipitated phase remained FeCoZr phase, resulting in a worse remanence. All the above changes were related to the cellular structures.