Abstract
The aim of the work is to study of the structure and phase composition of an oxide film formed on the surface of the layered coating of the Al-Ni system during high-temperature heating. It was experimentally established that at the initial stages of heat treatment, as a result of the interaction of the Al-Ni system layered coating with air oxygen, individual sections of Al2O3 oxide are formed on its surface, which are agglomerates of nanometre-thick plate crystals, which increase and grow into a continuous oxide film with increasing exposure time. Along with stable α-modification, transitional metastable δ- and θ-modifications are present in the film. An increase in the heating temperature leads to an intensification of the oxidation processes and the formation of a complex oxide film of Al2O3 and spinel NiAl2O4, 1–3 μm thick.
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