Crystallization of Fe75.8(Cu,Nb)3.5(Si,B)20.7 amorphous alloy studied by small angle neutron scattering

The crystallization of Fe75.8(Cu,Nb)3.5(Si,B)20.7 amorphous alloy has been studied by small angle neutron scattering in magnetic field. The magnetic contribution of the scattering has been distinguished from the nuclear contribution for alloys with various annealing temperatures and time. The existence of magnetic fluctuation has been confirmed even in amorphous state. The peak corresponding to the correlation between crystallized phase has been found in the Q region of 0.2 - 0.3 nm-1. However, over 0.4 nm-1 region the scattering function I(Q) decays as Q-2 - Q-3 which are unexpected functions for precipitates with rigid surface, Q-4. For the alloys of 500degC 60 min and 550degC 60 min the contribution of the nuclear scattering can be observed in the region of Q<0.1 nm-1. (author)