张力退火感生各向异性对纳米晶合金磁性能的影响  

Effect of Tension Annealing Induced-anisotropy on Magnetic Properties of Nanocrystalline Alloy

作　　者：潘贇 刘天成 李广敏[1,2] 戴白杨 吕娜[2] 张伟 唐冬冬 PAN Yun;LIU Tiancheng;LI Guangmin;DAI Baiyang;LV Na;ZHANG Wei;TANG Dongdong(China Iron&Steel Research Institute Group,Beijing 100081,China;Advanced Technology&Materials Co.Ltd.,Beijing 100081,China)

机构地区：[1]中国钢研科技集团有限公司,北京100081 [2]安泰科技股份有限公司,北京100081

出　　处：《材料研究学报》2020年第10期753-760,共8页Chinese Journal of Materials Research

基　　金：国家重点研发计划(2016YFB0300500)。

摘　　要：对Fe74.1Cu1Nb3Si15B6.9(%,原子分数)纳米晶合金进行连续张力退火,研究了张力退火感生各向异性对纳米晶合金磁性能的影响。结果表明,张力退火产生的感生各向异性常数(Ku)与退火张力(σ)满足线性关系。随着退火张力的增大合金在f=5 k Hz和H=3 A/m测试点的有效磁导率(μe)先增大后减小,且随着磁场和频率的提高有效磁导率(μe)的衰减减小。退火张力为67 MPa时有效磁导率(μe)在磁场强度H为0~800 A/m和频率f为1 k^3 MHz范围内保持约800,表现出恒导磁特性。同时,合金的单位质量损耗(Pm)随着退火张力的增大而减小,当退火张力为67 MPa时损耗为68 W/kg(测试条件:Bm=300 mT,f=100 kHz),与无张力退火相比下降约67%。同时,通过磁光克尔效应观察到张力退火后合金内部形成垂直于张力方向的180°片形畴,随着退火张力的增大磁畴宽度减小且趋于一致,退火张力为67 MPa时片形畴的宽度约为85μm。The samples of Fe74.1 Cu1 Nb3 Si15 B6.9(atomic fraction,%)nanocrystalline alloy were subjected to continuous tension annealing treatment,while the effect of the continuous tension annealing induced-anisotropy on their structure and magnetic properties was investigated.The results show that the induced anisotropy constant(Ku)and annealing tension(σ)fit linear relationship in the presence of tensile stress.The effective permeability(μe)at test points f=5 k Hz and H=3 A/m first increased and then decreased with the increase of annealing tension.The increase of annealing tension decelerate the process of effective permeability(μe)attenuation,which can remain constant over a wide range of magnetic field and frequency.Compared with other samples,the effective permeability(μe)of the alloy is nearly 800 in the testing range of 0~800 A/m(magnetic field)and 1 k^1 MHz(frequency)when tensile stress is 67 MPa.That show the tension annealed alloy has an excellent constant permeable property.Otherwise,with the increase of annealing tension the unit mass loss of the alloy decreases.When tensile stress is 67 MPa the unit mass loss of the alloy approximates 68 W/kg(testing condition:Bm=300 m T,f=100 kHz),which reduces nearly 67%compared with the absence of annealing tension.Besides,the 180°stripe magnetic domain observed by magneto-optical Kerr microscopy is perpendicular to the tensile stress on the alloy.The increase of tensile stress leads to decrease of the width of domain structures in the alloy and tends to comparable.When tensile stress is 67 MPa the width of domain structures is about 85μm.

关 键 词：金属材料 磁性能 张力退火 感生各向异性 

分 类 号：TG156.21[金属学及工艺—热处理]