7.1.3.3.4.1 Fe alloys

This chapter illustrates magnetic properties derived from the hysteresis loop of Fe alloys. Coercive field H_c, as a function of the annealing time t_a and ternary diagram of the coercive field in the as-quenched state and after annealing state of Fe-B-Si alloy are illustrated. The curve for remanence-to-saturation ratio, and loss L and exciting power S at a peak induction of Fe-B-Si and Fe-B-Si-C alloys are shown. Loss L after annealing with, and without magnetic field as a function of applied stress for various Fe alloys are figured out. Further, pulse loss per half cycle as a function of the induction rate for Fe-B-Si, Fe-B-Si-C, Co-Fe-B-Si, Fe-Ni-B-Mo and Co-Fe-Ni-B-Si-Mo alloys is shown. Amplitude permeability versus magnetic field, and real part and imaginary part of the complex permeability as a function of frequency are demonstrated. In addition, coercive field for the alloys, Fe-B-Si and Fe-B-Si-C are shown. Hysteresis loss per cycle for Fe-B-Si-C is illustrated.