INFLECTION OF COERCIVITY DURING LOCAL CRYSTALLIZATION OF Fe-Si-B AMORPHOUS ALLOYS

An inflection hehaviour was revealed during isothermal annealing under the observation oftransition of the coercivity of Fe-Si-B amorphous alloys during local crystallization.It maybe interpreted by the transition of α-Fe grain precipitated from single to multiple domain,Thus,the theoretical expression of H_0-t_a may be derived.The plot of expression H_0-t_a calcu-lated well represents the feature of the experimental curve.