Kinetics of phase formation of powdered composites of Fe-Ga during mechanochemical alloying

The kinetics studies of structural and phase transitions during mechanochemical interaction of mixture of Fe-20% Ga in a planetary mill AGO-2 are given. The milled samples obtained at various times of milling were characterized by X-ray diffraction, atomic force microscopy and Moessbauer spectroscopy. It is established that a composite structure on the basis of a disordered solid solution of Fe (Ga) with the structure of A2 with locally ordered phases of type D03 and L12 is the final product of a mechanical activation. It is noted that a longer time period for the mechanochemical formation of composites in Fe-Ga is required than in similar systems with low-melting metal. (authors).