Structural phase transformations during a solid-state reaction in a bilayer Al/Fe thin-film nanosystem

Phase formation processes at a solid state reaction between Fe and Al nanolayers were studied using in situ electron diffraction. The process of solid state reaction on the interface of the Fe and Al nanolayers was established to begin at $\approx$ 100$^{\circ}$C with the formation of a disordered solid solution of Al in $\alpha$-Fe. It was shown that in the process of further heating, intermetallic phases of FeAl6 and/or FeAl$_{6}$ и/или Fe$_{2}$Al$_{5}$, FeAl, Fe$_{3}$Al were successively formed.