Effect of wheel speed on phase formation and magnetic properties of (Nd0.4La0.6)-Fe-B melt-spun ribbons
Effect of wheel speed on phase formation and magnetic properties of (Nd0.4La0.6)-Fe-B melt-spun ribbons
复制标题
轮速对(Nd0.4La0.6)-Fe-B熔纺薄带相形成及磁性能的影响
DOI：
10.1016/j.jre.2018.02.013
复制
发表时间：
2018-11-01
影响因子：
4.9
通讯作者：
Zhou, Huaiying
中科院分区：
文献类型：
--
作者：
Wang, Liang;Wang, Jiang;Zhou, Huaiying
实验研究了快淬法制备的（Nd0.4La0.6）（15）Fe77.5B7.5和（Nd0.4La0.6）（13.4）Fe79.9B6.7薄带的相形成和磁性能。基于X射线衍射结果，所有的快淬薄带由具有tetraxyl 2：14：1型结构的主相和次要的α-Fe相组成。磁性测量表明，随着转速的增加，最大磁能积（BH（max））和剩磁（M-r）先增大后减小，矫顽力（H-ci）增大，这是由于α-Fe相的平均体积分数和平均晶粒尺寸的变化造成的。利用Henkel图分析了快淬薄带中2：14：1相和α-Fe相之间的相互作用，揭示了晶间交换耦合。当磁轮转速为26 m/s时，（Nd_（0.4）La_（0.6））（15）Fe_（77.5）B_（7.5）薄带的最佳磁性能为：H-ci = 7.27 kOe，M-r = 90.94 emu/g，（BH）（max）= 12.10 MGOe。结果表明，通过优化合金成分和制备工艺，可以提高高稀土La含量Nd-Fe-B快淬薄带的磁性能。(C)2018由Elsevier B. V.代表中国稀土学会出版。
The effect of wheel speed on phase formation and magnetic properties of (Nd0.4La0.6)(15)Fe77.5B7.5 and (Nd0.4La0.6)(13.4)Fe79.9B6.7 ribbons prepared by melt-spinning method was investigated experimentally. Based on X-ray diffraction results, all melt-spun ribbons consist of the main phase with the tetragonal 2:14:1 type structure and the minor alpha-Fe phase. Magnetic measurements show the maximum magnetic energy product ((BH)(max)) and the remanence (M-r) increases firstly and then decreases with the increase of wheel speed, while the coercivity (H-ci) increases, resulting from the variation of the average volume fraction of the alpha-Fe phase and the average grain size in the melt-spun ribbons. Using Henkel plots, the interaction between the 2:14:1 phase and the alpha-Fe phase in the melt-spun ribbons was analyzed and the intergranular exchange coupling is manifested. Optimal magnetic properties of H-ci = 7.27 kOe, M-r = 90.94 emu/g and (BH)(max) = 12.10 MGOe are achieved in the (Nd0.4La0.6)(15)Fe77.5B7.5 ribbon with the wheel speed of 26 m/s. It indicates that magnetic properties of Nd-Fe-B melt-spun ribbons with highly abundant rare earth element La can be improved by optimizing alloy composition and preparation process. (C) 2018 Published by Elsevier B.V. on behalf of Chinese Society of Rare Earths.