FeCoNiSiB非晶合金感生各向异性对磁性能的影响

Effect of induced anisotropy on magnetic properties of FeCoNiSiB amorphous alloy

研究了恒温张力退火和横磁退火工艺对FeCoNiSiB非晶合金各向异性及磁性能的影响。结果表明,合金经恒温张力退火后表现出高直流偏置性能和高损耗的特点,而经横磁退火后具有优异的综合软磁性能,即具有高直流偏置能力的同时具有低损耗的特点。其中,恒温张力退火过程中提高退火温度时合金直流偏置能力增加,550℃下张力退火5 min的直流偏置场强度H_(0.98)为195 A/m,对应的损耗值P_(cm)为7255 W/kg;而经450℃横磁退火后,合金直流偏置场强度H_(0.98)可达374 A/m,对应的损耗值P_(cm)仅为200 W/kg。除此之外,经恒温张力退火和横磁退火后FeCoNiSiB非晶合金内部均形成180°条形磁畴结构,但其磁化矢量方向分别平行和垂直于磁化方向。

Effects of isothermal tension annealing and transverse magnetic field annealing on anisotropy and magnetic properties of FeCoNiSiB amorphous alloy were investigated.The results show that the alloy exhibits higher DC tolerance property accompanied with higher core loss after isothermal tension annealing,while the alloy has excellent comprehensive soft magnetic properties including high DC tolerance and low core loss after transverse magnetic field annealing.During isothermal tension annealing process,the DC tolerance property of the alloy is improved with the increase of annealing temperature.After annealing at 550℃for 5 min with tensile stress,the DC-bias field intensity H_(0.98) of the alloy is 195 A/m and the corresponding core loss P_(cm) is 7255 W/kg.However,after annealing at 450℃with transverse magnetic field,the DC-bias field intensity H_(0.98) is improved to 374 A/m,and the corresponding core loss P_(cm) is only 200 W/kg.In addition,the 180°stripe magnetic domain structures are charactered after isothermal tension annealing and transverse magnetic field annealing,but the direction of magnetization vector in magnetic domain is parallel and perpendicular to the direction of magnetization respectively.