Abstract
The effect of isothermal heating on the oxide films phase composition in the Fe-Cr-Al system alloys with different aluminum contents is studied. It has been shown that in the temperature range of 600–800 °C the nature of alloys oxidation is identical. When the aluminum content in the alloy is 10 at. % only αFe2O3 (hematite) is formed on its surface, an increase in the aluminum content leads to the formation of αAl2O3 (corundum). An increase in temperature to 1100 °C intensifies the growth of oxide films in the surface layer, and an increase in the aluminum content ensures a stable growth of αAl2O3 oxide, which prevails over other oxides: αFe2O3, Cr0.75Fe1.25O3 and FeCr2O4.
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