Phase transformation, grain refinement and magnetic properties in melt-spun SmCo7−x(Cr3C2)x (x = 0–0.25) ribbons
Phase transformation, grain refinement and magnetic properties in melt-spun SmCo7−x(Cr3C2)x (x = 0–0.25) ribbons
复制标题
DOI：
10.1016/j.jallcom.2009.01.050
复制
发表时间：
2009-06
影响因子：
6.2
通讯作者：
Li Li-Li;A. Yan;J. Yi;G. Zhang;W. Xie;Yua-Hue Sun;C. Jie;Hongyu Lu
中科院分区：
文献类型：
--
作者：
Li Li-Li;A. Yan;J. Yi;G. Zhang;W. Xie;Yua-Hue Sun;C. Jie;Hongyu Lu
系统研究了微量Cr 3C 2对SmCo 7 −x（Cr 3C 2）x（x=0-0.25）快淬薄带组织和磁性能的影响。当x =0.2时，矫顽力从0.42kOe增加到7.48kOe，剩磁从71.1emu/g减小到54.4emu/g。根据显微组织分析结果，发现Cr 3C 2的加入对组织的细化和织构的形成起到了重要作用。通过添加Cr 3C 2，晶粒尺寸从300- 600 nm显著减小到80 nm以下。在Cr 3C 2掺杂薄带上的较小晶粒尺寸是由于在晶界中存在具有Cr：Co：C 3：1：5的组成的非磁性相，其抑制晶粒生长并细化晶粒。Cr 3C 2的加入促进了1：7 H相织构的形成。
The influence of minor addition of Cr3C2on the microstructure and magnetic properties of as-spun SmCo7−x(Cr3C2)x(x=0–0.25) ribbons has been investigated systematically. The coercivity increases from 0.42kOe for x=0 to 7.48kOe for x=0.2, while the remanence decreases from 71.1emu/g to 54.4emu/g. According to the results of microstructure analysis, it is found that the addition of Cr3C2plays an important role in microstructure refinement and the formation of crystallographic texture. The grain size is significantly reduced from 300–600nm to below 80nm by the addition of Cr3C2. The smaller grain size on Cr3C2-doped ribbons results from the presence of a non-magnetic phase with a composition of Cr:Co:C 3:1:5 in the grain boundary, which inhibits the grain growth and refines the grains. It is also found that the addition of Cr3C2promotes the formation of crystallographic texture of the 1:7H phase.