几种非晶态铁磁合金的磁导率稳定性的估计

EVALUATION OF PERMEABILITY STABILITY OF SEVERAL AMORPHOUS FERROMAGNETIC ALLOYS

本文根据非晶态铁磁合金的磁导率衰减动力学的实验数据得到的经验公式,利用平均激活能和频率因子的实验值估计了预退火的非晶合金Fe_(76)Si_(10)B_(14),Fe_(40)Ni_(38)Mo_4B_(18)和(Fe_(0.1)Ni_(0.35)Co_(0.55))_(78)Si_8B_(14)的起始磁导率的相对稳定程度。计算结果表明,虽然不能实质上消除磁导率的不稳定性,但是大约在不超过100℃的温度范围内,磁导率相对稳定程度对实际应用是足够的。换句话说,在相当长时间内,磁导率衰减相当小。

The evaluation of the relative stability of initial permeability hasbeen made for the pre-annealed amorphous ferromagnetic alloys Fe_(76)Si_(10)B_(14), Fe_(40)Ni_(38)Mo_4B_(18) and (Fe_(0.1)Ni_(0.35)Co_(0.55))_(78)Si_8B_(14) by the experlmental values of average activa-tion energy and frequency factors on the basis of the empirical expression deducedby experimental data of the kinetics of their permeability decay. Calculated resultsshow that the relative stability of permeability is sufficient for practical uses inthe temperature range within 100℃, although the permeability instability can notbe substantially eliminated. In other words, the permeability decay is considerablysmall within a period of considerable length.