Phase separation and domain structure of iron-based ordering alloys

Abstract
The process of ordering with phase separation and domain structure of Fe-Al and Fe-Ga alloys in the regions of mixed phases A2 + B2 and A2 + DO3 have been investigated by transmission electron microscopy. Observation by dark field micrographs with superlattice reflections revealed a complicated process of phase separation strongly depending on alloy composition and temperature, which was in good agreement with thermodynamics based on Landau's phenomenological theory.