热处理温度对Fe-Ni合金薄膜微结构及磁性的影响  

Effects of heat treatment temperature on microstructure and magnetic properties of Fe-Ni alloy film

作　　者：刘天成[1] 卢志超[1] 李德仁[1] 卢燕平[2] 孙克[1] 周少雄[1] 

机构地区：[1]钢铁研究总院安泰科技股份有限公司,北京100081 [2]北京科技大学材料科学与工程学院,北京100083

出　　处：《材料热处理学报》2007年第6期1-5,共5页Transactions of Materials and Heat Treatment

基　　金：国家高技术研究发展计划(863计划)资助项目(2003AA30251);北京市科技计划项目(D0405003040121)

摘　　要：采用直流电沉积法在硫酸盐-氯化物镀液中制备了Fe-44wt％Ni纳米晶合金薄膜。通过原子力显微镜（AFM）、X射线衍射（XRD）、透射电子显微镜（TEM）以及开路磁测量装置，对Fe-44wt％Ni合金薄膜镀态和退火态样品的微结构和磁性能进行测量。结果表明：退火温度升高能够降低薄膜内应力，使薄膜结晶均匀，但对薄膜晶粒尺寸和磁性能影响很大。Fe-44wt％Ni合金薄膜是由γ-（Fe，Ni）相和α-（Fe，Ni）相构成。在250℃真空退火处理1h后Fe-44wt％Ni合金薄膜的晶粒尺寸在20～30nm之间，且具有良好的软磁性能，饱和磁感应强度BS为1．06T，矫顽力HC为40A／m。Fe-44wt% Ni alloy film was prepared by DC electroplating technique in sulphate-chloride electrolyte. The morphology, microstructure and magnetic properties of the Fe-44wt% Ni film after heat treatment was investigated by means of SEM, AFM, TEM, XRD and magnetic measurement equipment. The results show that the interior stress greatly decreases and the crystalline size increases in the film as the heat treatment temperature increases. The Fe-44wt%Ni alloy film was identified as γ＋α phase. With the heat treatment temperature increasing, the transition of structure from γ-phase to α-phase in Fe-44wt% Ni film occurs. The optimum heat treatment temperature was determined. After heat treatment at 250℃ for one hour, the alloy film presents the structure with strong （111 ） and （200） fibre texture, the crystalline size of Fe-44wt% Ni film is 20-30nm, the saturated intensity of magnetization reaches 1.06T, the coercivity is 40A/m.

关 键 词：Fe—Ni薄膜 热处理 微结构 纳米 软磁性能 

分 类 号：TQ153.2[化学工程—电化学工业] TG151[金属学及工艺—热处理]