日本金属学会誌

J. Japan Inst. Metals, Vol. 40, No. 2 (1976),
pp. 136-139

High Magnetic Permeability Alloys ``Hardperm'' in the Ni-Fe-Nb-Mo System

Hakaru Masumoto1, Masakatsu Hinai1 and Y\=uetsu Murakami1

1The Research Institute of Electric and Magnetic Alloys, Higashi 8-bancho, Sendai, 980

Abstract:

Ni-Fe-Nb-Mo alloys were heated in hydrogen atmosphere at 1150°C for 3 hr and then cooled at various rates from a temperature above the order-disorder transformation points. The highest initial permeability of 103000 are obtained with the alloy of 80.12%Ni, 11.42%Fe, 6.92%Nb, and 1.54%Mo when cooled at the rate of 50°C/hr, and the highest maximum permeability of 434000 with the alloy of 80.19%Ni, 10.71%Fe, 8.10%Nb and 1.00%Mo when cooled at 70°C/hr. The alloy with the highest initial permeability exhibited an electrical resistivity of 75.3 μ \varOmega-cm and 199 Vickers hardness. The high permeability Ni-Fe-Nb-Mo alloys showed very low values of saturation magnetostriction constant.


(Received 1975/08/19)

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