退火温度对Fe_(40)Co_(40)Zr_7Nb_2AlB_9Cu合金的结构、热行为及磁性能的影响  

Effects of annealing temperature on the structure,thermal behavior and magnetic properties of Fe_(40)Co_(40)Zr_7Nb_2AlB_9Cu alloy

作　　者：华中[1] 刘洁[1] 王丽丽[1] 于万秋[1] 董丽荣[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：《电子元件与材料》2012年第6期48-51,共4页Electronic Components And Materials

基　　金：吉林省科技发展计划资助项目(No.201105083);教育厅“十二五”科学技术研究项目资助(No.2011-158);吉林师范大学研究生创新科研计划资助(No.201103)

摘　　要：采用单辊快淬法制备了Fe40Co40Zr7Nb2AlB9Cu非晶合金薄带,在不同温度下对其进行等温退火处理。研究了退火温度对合金的结构、热行为和磁性能的影响。结果表明:Fe40Co40Zr7Nb2AlB9Cu非晶合金的DTA曲线存在2个晶化放热峰,晶化激活能分别为267.3 kJ/mol和188.3 kJ/mol。其晶化过程为:非晶→非晶+α-FeCo→α-FeCo+Co2Zr+ZrCo3B2+Fe(Co)3Zr。α-FeCo相的晶化体积分数和晶粒尺寸随退火温度的升高而逐渐增大。低于873 K退火时,矫顽力变化不明显;873 K退火时,矫顽力达到最小值0.27 kA/m;高于873 K退火时,矫顽力逐渐增大。Fe40Co40Zr7Nb2A1B9Cu amorphous ribbons were prepared by the single roller melt-spinning method and isothermally annealed at different temperatures. The effects of annealing temperature on the structure, thermal behavior and magnetic property of alloy were investigated. The results show that there are two crystallization exothermic peaks in the DTA curve of Fe40Co40Zr7Nb2AIB9Cu amorphous alloy. The crystallization activation energies are 267.3 kJ/mol and 188.3 kJ/mol, respectively. The crystallization process is amorphous→ amorphous ＋ a-FeCo → a-FeCo ＋ Co2Zr ＋ ZrCo3B2 ＋ Fe（Co）aZr. Both the crystallization volume fraction and grain size of a-FeCo crystalline phase increase with the increasing of annealing temperature. The coercivity keeps almost unchanged below 873 K and reaches a minimum value （0.27 kA/m） at 873 K, then it increases gradually above 873 K.

关 键 词：Fe40Co40Zr7Nb2AlB9Cu薄带 晶化过程 退火温度 升温速率 

分 类 号：TG139.8[一般工业技术—材料科学与工程]