Abstract
The magnetic properties of Zr- and B-added Supersendust (Fe-Al-Si-Ni) alloy ribbons were studied. Although the ribbons became brittle and their magnetization decreased with an increase in Zr and B addition to the Supersendust, their soft magnetic properties improved. Ribbons with ductility after melt quenching and fairly low coercivity after annealing were obtained by the addition of about 1.5 at% Zr and 8 at% B to the Supersendust. The structural change from an amorphous to a microcrystalline state led to a decrease in the magnetostriction and coercivity and an increase in the initial permeability. Microcrystalline Fe69.7Al7Si9.8Ni4Zr1.5B8 alloy exhibited a fairly high permeability of about 25,000.
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