Iron aluminides are of engineering interest because of their attractive mechanical and corrosion-resisting properties as well as their relatively low cost since they contain little or no expensive alloying elements. They are relatively light, with densities about 75–85 % that of iron, and have very high specific elastic moduli (E/ρ). Room temperature mechanical strength is good, similar to that of ferritic steels, with reasonable ductility for intermetallics, but which becomes low for aluminum contents near the Fe3Al and FeAl stoichiometries [1, 2, 3]. The outstanding properties of these aluminides are their oxidation-corrosion resistances, especially in industrial oxidizing, carburizing, or sulphidizing environments, and this is the major driving force for application of iron aluminides as construction materials or as coatings [4]. There has been much interest given to the development of suitable alloy varieties over the past decades, with attention initially aimed at the...