EFFECTS OF ANNEALING ON MAGNETIC-PROPERTIES OF FE78B13SI9

We have annealed amorphous Fe78B13Si9 samples at temperatures Ta = 355 to 460 ° C for time ta = 10 to 60 min, in an atmosphere with purging of nitrogen gas. After thermal treatment, we examined the hysteresis loop, DSC curve, and the X-ray diffractogram of each sample. The coercivity Hc, the peak induction Bmax, and the loss Wh were analysed to study the affects of annealing. Stress-relief and partial crystallization are two important parameters in determining optimal annealing conditions. © 1990 Chapman and Hall Ltd.