Abstract
(Fe, Co, Ni)-(Zr, M)-B (M=Nb, Ta, Ti) amorphous alloys exhibit a large supercooled liquid region (ΔTx) up to 90 K that have allowed us to prepare bulk amorphous samples with thickness up to 2 mm by mould casting method. These alloys have also good soft magnetic properties, i. e. saturation magnetisation (Bs) up to 1.1 T, coercive field (Hc)of 3 A/m and permeability of about 10000 at 500 Hz in the as-cast state. The Curie temperatures (Tc) of these amorphous alloys are between 513 and 573 K. The thermal and thermomagnetic annealing applied to (Fe, Co, Ni)70(Zr, M)10B20 (M=Nb, Ta, Ti) amorphous samples cause the change of their amorphous structure and magnetic properties. The obtaining of these bulk amorphous alloys with good soft magnetic properties will allow using them in many engineering applications.
