Effect of wheel speed on phase formation and magnetic properties of (Nd0.4La0.6)-Fe-B melt-spun ribbons
来源期刊：JOURNAL OF RARE EARTHS2018年第11期
论文作者：Liang Wang Jiang Wang Maohua Rong Guanghui Rao Huaiying Zhou
文章页码：1179 - 1183
摘 要：The effect of wheel speed on phase formation and magnetic properties of(Nd0.4La0.6)15Fe77.5B7.5 and(Nd0.4La0.6)13.4Fe79.9B6.7 ribbons prepared by me It-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 a-Fe phase. Magnetic measurements show the maximum magnetic energy product(（BH）max) and the remanence（Mr） increases firstly and then decreases with the increase of wheel speed, while the coercivity(Hci) increases, resulting from the variation of the average volume fraction of the a-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 a-Fe phase in the melt-spun ribbons was analyzed and the intergranular exchange coupling is manifested. Optimal magnetic properties of Hci = 7.27 kOe,Mr = 90,94 emu/g and（BH）max = 12.10 MGOe are achieved in the(Nd0.4La0.6)15Fe77.5B7.5 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.
Liang Wang，Jiang Wang，Maohua Rong，Guanghui Rao，Huaiying Zhou
School of Material Science and Engineering & Guangxi Key Laboratory of Information Materials,Guilin University of Electronic Technology
摘 要：The effect of wheel speed on phase formation and magnetic properties of(Nd0.4La0.6)15Fe77.5B7.5 and(Nd0.4La0.6)13.4Fe79.9B6.7 ribbons prepared by me It-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 a-Fe phase. Magnetic measurements show the maximum magnetic energy product(（BH）max) and the remanence（Mr） increases firstly and then decreases with the increase of wheel speed, while the coercivity(Hci) increases, resulting from the variation of the average volume fraction of the a-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 a-Fe phase in the melt-spun ribbons was analyzed and the intergranular exchange coupling is manifested. Optimal magnetic properties of Hci = 7.27 kOe,Mr = 90,94 emu/g and（BH）max = 12.10 MGOe are achieved in the(Nd0.4La0.6)15Fe77.5B7.5 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.
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