Fe_(78)Co_2Zr_8Nb_2B_9M_1(M=Ta、Cu)合金的微观结构和巨磁阻抗效应  

Microstructure,magnetic property and giant magnetoimpedance effect of Fe_(78)Co_2Zr_8Nb_2B_9M_1(M=Ta、Cu) alloys

作　　者：华中[1] 刘洁[1] 左斌[1] 王丽丽[1] 于万秋[1] 赵立猛[1] 

机构地区：[1]吉林师范大学功能材料物理与化学教育部重点实验室,吉林四平136000

出　　处：《材料热处理学报》2013年第10期25-28,共4页Transactions of Materials and Heat Treatment

基　　金：吉林省科技发展计划资助项目(201105083);教育厅"十二五"科学技术研究项目(2011-158);吉林师范大学研究生创新科研计划项目(201103)

摘　　要：采用单辊快淬法制备Fe78Co2Zr8Nb2B9M1(M=Ta、Cu)非晶合金薄带,在不同温度下对合金进行等温热处理。利用DTA、XRD、TEM、VSM和阻抗分析仪研究合金的热行为、微观结构、磁性能及巨磁阻抗效应。结果表明,晶化初期,Fe78Co2Zr8Nb2B9Ta1非晶合金析出α-Mn亚稳相和α-Fe(Co)相,Fe78Co2Zr8Nb2B9Cu1非晶合金仅析出α-Fe(Co)相。600℃退火后的Fe78Co2Zr8Nb2B9Cu1合金中晶化相的平均晶粒尺寸小于Fe78Co2Zr8Nb2B9Ta1合金。合金的M s均随退火温度的升高而逐渐增大。Fe78Co2Zr8Nb2B9Ta1合金的H c在600℃退火后明显增大,这与α-Mn型相的析出有关;而Fe78Co2Zr8Nb2B9Cu1合金的H c在600℃退火后达到极小值。合金的GMI max值随退火温度增加先上升后下降。Fe78Co2Zr8Nb2B9Cu1合金具有比Fe78Co2Zr8Nb2B9Ta1合金更显著的GMI效应。Fe78Co2Zr8Nb2B9M1（M = Ta, Cu） amorphous ribbons were prepared by the single roller melt-spinning and isothermally annealed at different temperatures. The thermal behavior, microstructure, magnetic property and giant magnetoimpedance effect of the alloys were investigated by DTA, XRD, TEM, VSM and impedance analyzer. The results show that the ct-Mn type and α-Fe （Co） phases, and single α-Fe （Co） phase exist in Fe78Co2Zr8Nb2B9Ta1 and Fe78 CoEZr8 Nb2B9Cu1 alloy in the initial crystallization stage, respectively. The mean grain size of crystalline phase in Fe78 CoEZr8 Nb2B9Cu1 alloy is smaller than that in FeT8 C02ZrsNb2 B9Ta1 alloy at 600℃. Ms of the two alloys increases with the increasing annealing temperature. Hc of Fe78Co2ZrsNbEB9Ta1 alloy increases obviously at 600℃ , which is related to the precipitation of α-Mn. Hc of Fe78CoEZrsNb2B9Cu1 reaches a minimum value at 600℃. The GMImax of the two alloys first increases and then decreases with the increasing annealing temperature. The GMI effect in FeTs Co2Zr8Nb2B9Cu1 alloy is better than that in Fe78Co2Zr8Nb2 B9Ta1 alloy.

关 键 词：微观结构 亚稳相 磁性能 巨磁阻抗效应 

分 类 号：TG132.2[一般工业技术—材料科学与工程]