张延忠
金属学报
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。
关键词:
磁导率衰减
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activation energy
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frequency factor
ZHANG Yanzhong Shanghai Iron and Steel Research Institute
,
Shanghai
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China ZHANG Yanzhong Senior Engineer
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Measuring and Testing Centre
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Shanghai Iron and Steel Research Institute
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Shanghai 200940
,
China
金属学报(英文版)
The evaluation of the relative stability of initial permeability has been made of the pre-an- nealed 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))_78Si_8B_(14) by the experimental values of average activation energy and fre- quency factors on the basis of the empirical expression deduced by experimental data of the kinetics of their permeability decay.Calculated results show that the relative stability of permeability is sufficient for practical uses in the temperature range within 100℃,although the permeability instability can not be substantially eliminated.In other words,the permeability decay is considerably small within a period of considerable length.
关键词:
permeability decay
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