摘要
对快淬Nd8.5Fe77Co5Zr2.7Ga0.6B6.2合金,采用脉冲磁场下热处理的方法制备纳米晶复合永磁材料,研究脉冲磁退火对合金的晶化过程、相组成、交换耦合作用以及磁性能的影响,结果表明,同常规退火相比,脉冲磁退火降低了合金的最佳退火温度,改善了合金的微结构,从而增强了软、硬磁性晶粒间的交换耦合作用,明显提高了合金的磁性能,经670℃脉冲磁退火后合金具有最佳的磁性能,即iHc=586kA/m,Jr=1.01T,(BH)max=138kJ/m3,最大磁能积比常规退火工艺条件下提高了15%。
Effects of the pulsed magnetic field treatment on the microstructure and magnetic properties for nano- composite Nd8.5Fe77Co5Zr2.7Ga0.6B6.2 alloy were investigated. The results showed that the magnetic annealing results in a refined microstructure and an enhanced exchange coupling between magnetically hard and soft pha- ses. The optimal magnetic properties of ：Hc = 586kA/m, Jr=1.01T and （BH）mox = 138kJ/m3 were obtained for nanocomposite Nd8.5Fe77Co5Zr2.7Ga0.6B6.2 ribbons annealed with a pulsed magnetic field at 670℃ for 4min. The （BH）max has an increase of 15% in comparison with that of samples without magnetic annealing.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2013年第5期618-622,共5页
Journal of Functional Materials
基金
国家自然科学基金资助项目(51071099
51171101)
关键词
纳米晶复合
微结构
磁性能
脉冲磁场
nanocomposite
microstructure
magnetic properties
pulsed magnetic field
