EVALUATION OF PERMEABILITY STABILITY OF SEVERAL AMORPHOUS FERROMAGNETIC ALLOYS

Acta Metall Sin

1989, Vol. 25

Issue (6): 116-119 DOI:

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EVALUATION OF PERMEABILITY STABILITY OF SEVERAL AMORPHOUS FERROMAGNETIC ALLOYS

ZHANG Yanzhong Shanghai Iron and Steel Research Institute ZHANG Yanzhong. senior engineer;Steel Research Institute; Shanghai Measuring and Testing Centre; Shanghai Iron and 200990

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ZHANG Yanzhong Shanghai Iron and Steel Research Institute ZHANG Yanzhong. senior engineer;Steel Research Institute; Shanghai Measuring and Testing Centre; Shanghai Iron and 200990. EVALUATION OF PERMEABILITY STABILITY OF SEVERAL AMORPHOUS FERROMAGNETIC ALLOYS. Acta Metall Sin, 1989, 25(6): 116-119.

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Abstract 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.

Key words: permeability decay activation energy frequency factor

Received: 18 June 1989

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