Abstract

BONYUET, D et al. STUDY OF THE Fe-75%Ag SYSTEM OBTAINED BY MECHANICAL ALLOYING. Rev. LatinAm. Met. Mat. [online]. 2002, vol.22, n.1, pp.8-11. ISSN 0255-6952.

Mechanical alloying (MA) is a powder processing technique, which allows us to induce solid state reactions in binary systems immiscible in equilibrium. Fe and Ag have a mutually repulsive nature that makes them completely immiscible under thermodynamically stable conditions. The ball milling process being a non-equilibrium technique seems promising in obtaining at least a partial solid solution in this system. Mixtures of Fe and Ag powders with 75 wt% Ag were studied by x-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). We have found that it is possible to obtain a small mutual solid solution in this system by MA. This is also confirmed by Mössbauer spectroscopy.

Keywords : mechanical alloying; immiscible systems.