Co添加对FeSiBCuNb非晶纳米晶合金软磁性能的影响  

Effect of Co element addition on soft magnetic properties ofFeSiBCuNb amorphous nanocrystalline alloy

作　　者：郭琦 李晓涵 王志成 金亚旭[1] 张克维[1] 胡季帆 GUO Qi;LI Xiaohan;WANG Zhicheng;JIN Yaxu;ZHANG Kewei;HU Jifan(School of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China)

机构地区：[1]太原科技大学材料科学与工程学院,太原030024

出　　处：《功能材料》2024年第8期8083-8089,共7页Journal of Functional Materials

基　　金：国家自然科学基金项目(51901150);山西省基础研究计划项目(20210302124535,202103021223273);天津市光电检测技术与系统重点实验室开放课题(2023LOTDS001,2023LOTDS002)。

摘　　要：通过单辊甩带法制备成分为Fe_(80.5-x)Co_(x)Si_(3.5)B_(13.5)Cu_(1)Nb_(1.5)(x=0,3,5,7,9)非晶合金带材,研究了Co含量及退火温度对非晶纳米晶合金软磁性能与组织结构的影响。其中,退火温度为510℃,Co含量x=5时,Fe_(75.5)Co_(5)Si_(3.5)B_(13.5) Cu_(1)Nb_(1.5)非晶合金形成了由非晶基体和纳米晶粒组成的双相结构,晶粒尺寸D约为13.5 nm,具有低矫顽力H_(c)=2.5 A/m及高饱和磁感应强度B_(s)=1.59 T,获得了优异综合软磁性能。通过磁光克尔(magnetic-optical kerr,MOKE)显微镜观测合金表面磁畴结构,当退火温度为510℃,Co含量x=5时,内应力释放相对完全,纳米晶微观结构更加均匀,条状磁畴更清晰平直,磁畴的变化与H_(c)变化相对应。Amorphous alloy ribbons with nominal compositions of Fe_(80.5-x)Co_(x)Si_(3.5)B_(13.5)Cu_(1)Nb_(1.5)(x=0,3,5,7,9)were prepared by melt spinning technique,which is used to investigate the effects of Co content and annealing temperature on the soft magnetic properties and organization of amorphous nanocrystalline alloys.The Fe_(75.5)Co_(5)Si_(3.5)B_(13.5) Cu_(1)Nb_(1.5) quenched amorphous alloy under annealing temperature of 510℃ form an amorphous/nanocrystalline composite structure consisting of an amorphous matrix and nanograins and have excellent comprehensive soft magnetic properties,which contain the grain size D=13.5 nm,low coercivity H_(c)=2.5 A/m and high saturation magnetic induction intensity B_(s)=1.59 T.The magnetic domain structures on the surface of the ribbons at different annealing temperatures were observed by magnetic-optical kerr(MOKE)microscope.When the annealing temperature is 510℃ and the Co content x is 5,the internal stress release relative completely,which leads to the uniform nanocrystalline microstructure and straight clearly striped domains,and the change of the magnetic domains corresponded to the change of H_(c).

关 键 词：非晶纳米晶软磁合金 Co元素 矫顽力 磁畴 退火温度 

分 类 号：TM271[一般工业技术—材料科学与工程]