FeNiCoSiBCuNb合金微观结构、晶化行为和软磁性能的研究  

Microstructure,crystallization behavior andsoft magnetic properties of FeNiCoSiBCuNb alloy

作　　者：康树杰 陈哲 朱乾科 管立斌[2] 张克维[1] KANG Shujie;CHEN Zhe;ZHU Qianke;GUAN Libin;ZHANG Kewei(Laboratory of Magnetic and Electric Functional Materials and the Applications,he Key Laboratory of Shanxi Province,School of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China;The 33rd Research Institute of China Electronics Technology Group Corporation,Taiyuan 030006,China)

机构地区：[1]太原科技大学材料科学与工程学院,磁电功能材料及应用山西省重点实验室,太原030024 [2]中国电子科技集团公司第三十三研究所,太原030006

出　　处：《功能材料》2023年第5期5178-5185,共8页Journal of Functional Materials

基　　金：山西省应用基础研究计划(202103021223270);山西省高等学校科技创新项目(2021L309);中国—白俄罗斯“一带一路”联合实验室开放基金项目(ZBKF2022030702);太原科技大学科研启动基金项目(20212027);吕梁引进高层次科技人才重点研发项目(2021RC-2-15);山西省重点研发计划(202102050201006)。

摘　　要：FeNi基非晶软磁合金具有矫顽力低、磁频特性好等特点,应用前景非常广泛,但也面临诸多问题。为了改善FeNi基非晶软磁合金非晶形成能力、热稳定性和软磁性能,通过Co元素对Ni元素的部分替换,利用XRD、DSC、VSM、MOKE等表征手段,系统研究了(Fe_(40)Ni_(40-x)Co_(x)Si_(9.5)B_(9.5)Cu_(1))_(0.97)Nb_(0.03)(x=2,4,6,8)非晶合金带材的微观结构、热稳定性、晶化行为及软磁性能的影响。研究表明,Co元素的部分替换,FeNiSiBCuNb合金体系均表现出较好非晶形成能力和热稳定性能;当x=4在最优退火温度713 K时,矫顽力H_(c)低至0.44 A/m,有效磁导率μ_(e)(f=1 kHz)为16290,此时合金中的内应力得到释放,自由体积减少,结构更加均匀,磁晶各向异性降低,磁畴钉轧点减少,形成d=122μm宽且均匀的磁畴结构;当x=6时,饱和磁感应强度B_(s)在退火温度673 K时可以达到1.15 T,此时Co元素与Fe元素之间的磁交换耦合作用使合金平均原子磁矩达到最优,表现出较好的软磁性能。FeNi-based amorphous soft magnetic alloys have low coercivity and good magnetic frequency characteristics,and are very promising for applications,but they also face many problems.In this study,in order to improve the amorphous formation ability,thermal stability and soft magnetic properties of FeNi-based amorphous soft magnetic alloys,by partially replacing Ni elements with Co element,the effects of micro-structure,thermal stability,crystallization behavior and soft magnetic properties of(Fe_(40)Ni_(40-x)Co_(x)Si_(9.5)B_(9.5)Cu_(1))_(0.97)Nb_(0.03)(x=2,4,6,8)amorphous alloy strips were systematically studied by means of XRD,DSC,VSM,MOKE and other characterization methods.The research shows that FeNiSiBCuNb alloy system shows better amorphous forming ability and thermal stability performance with partial substitution of Co element.When x=4 at the optimal annealing temperature of 713 K,coercivity H_(c)is as low as 0.44 A/m,and the effective magnetic permeabilityμ_(e)(f=1 kHz)is 16290.At this time,the internal stress in the alloy is released,the free volume is reduced,and the structure is more uniform.The magneto crystalline anisotropy is reduced,the magnetic domain pinning point is reduced,a d=122μm wide and uniform magnetic domain structure is formed.When x=6,the saturation magnetic induction intensity B_(s)can reach 1.15 T at the annealing temperature of 673 K.At this time,the magnetic exchange coupling between Co element and Fe element optimizes the average atomic magnetic moment of the alloy,showing good soft magnetic properties.

关 键 词：FeNi基非晶合金 激活能 矫顽力 饱和磁感应强度 

分 类 号：TM271[一般工业技术—材料科学与工程]