Moessbauer study of mechanical deformation induced order-disorder transition in Fe_(75)AlSi alloys

摘要

We study the influence of different Al/Si ratios on the magnetic and structural properties of mechanically disordered powder Fe_(75)Al_(25-x)Si_x alloys. The results indicate that addition of Si to binary Fe-Al alloys makes the disordering more difficult. The study of the hyperfine fields indicates that there is an inversion of the behavior of the hyperfine field of the Fe atoms surrounded by 8 Fe atoms with disordering. The magnetic and hyperfine measurements indicate that the influence of Si is opposite to the one of Al in the magnetism of Fe atoms.