Compositional optimization of high induction (>1.7T) FeCo-based nanocomposite alloys with enhancement of thermo-physical and magnetic properties

The substitution of Fe with Co and B with Si is investigated in a series of high induction Fe₈₄B₁₃Nb₂Cu₁ amorphous alloys. The as-quenched melt-spun alloys are structurally amorphous in wheel side and a mild crystallites alongwith amorphous phase in air side. The alloy with 35 at% Co addition depicts improved thermal stability, saturation induction and coercivity, and the optimal combination of soft magnetic properties is achieved for an extended annealing temperature range. The additional 10 at% Si deteriorates soft magnetic properties.