Effects of induction annealing on the magnetic properties of amorphous alloys

Abstract Cores made of Fe 77 B 16 Si 5 Cr 2 amorphous ribbons were annealed in a high frequency induction field. This field provided heat and generated an alternating magnetic flux in the cores. The optimum temperature and duration of induction annealing were even lower and shorter than those in conventional field annealing. The soft magnetic properties of the induction annealed cores were better than those of the as-quenched amorphous alloys. At the same time, the induction annealed amorphous ribbon shows a higher fracture stress than conventionally annealed samples.