Oxide Films Formed on FeCrAl Steel Foil Coated with Pt and Al Films

The investigations were aimed to characterize the oxide films (Al 2 O 3 ) in terms of the crystal structure development and their impact on increase in mechanical distribution of Pt in volume of the film, as a system predisposed to carry out catalytic processes. The morphology and phase composition of oxide films formed on the surface of FeCrAl steel foil coated with Al and Pt films and Al/Pt composition films after oxidation at high temperature were investigated. All samples with films were oxidized in an atmosphere containing 67% O 2 /Ar at 850 ° C in a period of 24 h. As a result of the oxidation processes there were formed θ-Al 2 O 3 oxides of whisker structure of a considerable size, while whiskers of θ-Al 2 O 3 oxides formed on the samples coated with Pt films were smaller but with higher density. There was also α-Al 2 O 3 phase in the form of solids in the immediate vicinity of the steel substrate.

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