Influence of thermal treatment on microstructure of Fe75Ni2Si8B13C2 amorphous alloy

► Multi-step structural transformation found in Fe75Ni2Si8B13C2 amorphous alloy. ► Microstructural analysis showed no difference between two sides of the ribbon. ► Fe3B probably acts as an intermediate in the formation of Fe2B. ► Si and B in the alloy show a tendency to separate into different phases.