摘要
采用斜喷工艺制备4种厚度的Fe_(73)Ni_(1)Cu_(1)Nb_(3)Si_(13)B_(9)非晶带材,并进行了真空晶化退火,用扫描电镜(SEM)和原子力显微镜(AFM)分析了晶化退火前后带材自由面结构变化情况,研究结果表明制备态带材的表面平整度、表观缺陷都能达到应用要求,随着带材厚度降低,带材自由面表观平整度随之提高,表观缺陷也随之减少。晶化退火后,随内应力的消除,非晶带材的表观平整度进一步提高,但随着厚度减小,晶化后磁畴结构展现越加明显,柱状磁畴变得更加细小而均匀,同时伴随无取向的非晶态结构向晶态结构转变。而AFM观察结果表明晶化退火后,由于晶化析出物的长大导致带材自由面的微观平整度降低,并随着带材厚度降低,晶化过程越完全,αFe(Si)晶粒析晶数量随之增加,而尺寸随之减小,此时外磁场对多晶磁畴的影响就越大,进而会展现出磁导率的提升和矫顽力的降低等特性改变,结果也进一步说明随着带材厚度减小,晶化时间可以随之缩短或晶化温度随之降低。
In recent years,researchers had carried out a lot of basic researches to reduce the energy loss of Fe-based nanocrystalline soft magnetic alloy devices. At present,there were two main ways to effectively reduce the loss of Fe-based nanocrystalline soft magnetic alloy. The first was to design and develop new alloy systems,such as FeSiCuBb,FeCuB,FeCusiB,FeNb,FeNbC,and develop nanocrystalline soft magnetic alloy with high saturation magnetization(BS)and low coercivity(HC)through alloy composition design.The other was to improve the soft magnetic properties of the nanocrystalline soft magnetic alloy,especially the high frequency soft magnetic properties,by reducing the thickness of the nanocrystalline soft magnetic strip,so as to reduce its loss. Nanocrystalline soft magnetic alloy composition design and development of related researches were numerous,and made a lot of valuable research results,but the research on the thinning nanocrystalline soft magnetic alloy was lack relatively. In order to prepare high quality amorphous soft magnetic alloy strip with different thickness,small amount of Ni was introduced on the basis of the existing industrial production 1 K107 alloy(FeCuNbSiB),and could improve the viscosity of alloy steel and broaden the optimal spraying temperature range,which was conducive to the preparation of high-quality strip. At the same time,a new oblique spraying process was used to produce high quality strip with various thickness by adjusting the process parameter. The effect of strip thickness on the apparent properties of the nanocrystalline soft magnetic alloy was studied by analyzing the apparent structure of the alloy before and after crystallization,the variations of soft magnetic properties and application properties of nanocrystalline soft magnetic alloys after thinning were studied. Based on 1 K107 alloys(FeCuBSiB),the nominal composition of the alloy was Fe73 Ni1 Cu1 Nb3 Si13 B9(atom fraction). Then the raw material was put into the furnace,it was vacuumed to 4×10^(-3) Pa to prevent materi
作者
丁昂
郝洁
黄敬晖
张延松
黄辉
李孟勇
Ding Ang;Hao Jie;Huang Jinghui;Zhang Yansong;Huang Hui;Li Mengyong(Institute of Industry,Ningbo Institute of Engineering,Ningbo 315103,China;Ningbo Zhong Xing New Materials Research Institute Co.,Ltd.,Ningbo 315153,China;Dalian University of Technology Dalian 116024,China;52 Institute of China North Industries Group,Inner Mongolia Metal Materials Research Institute,Ningbo 315103,China;Zhejiang Hengji Yongxin Powder Metallurgy Co.,Ltd.,Ningbo 315000,China)
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2021年第8期936-943,共8页
Chinese Journal of Rare Metals
基金
国家自然科学基金项目(51401184)资助。
关键词
非晶带材
结构
纳米晶
厚度
amorphous strip
structure
nanocrystals
thickness
