Ribbon samples near the Sendust compositionxFe,ySi,zAl (9.12 wt%≤ y ≤ 9.98wt%, 4.88 wt%≤ z ≤ 5.88wt%) were prepared by rapid quenching techniques. The ribbons were about 40 μm in thickness, 2 mm in width, and 20 m in length. These ribbons were flexible, and it was possible to wind them around a rod 15 mm diameter, The density and Vickers hardness were 6.4 g/cm3and 560, respectively. Their electrical resistivity was 88μΩ. cm after annealing. The coercive field Hcand the initial permeability μiin a straight ribbon of composition 84.9 Fe, 9.62 Si, 5.48 Al were 24 mOe and 30 000 after annealing.
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Tsuya et al. (1979) studied this question.
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