Chemical and phase composition of nanosize oxide and passive films on Ni-Cr alloys. I. XPS studies of films obtained by alloy oxidation in air |
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| Authors: | Yu Ya Andreev E A Skryleva I A Safonov V V Dushik |
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| Affiliation: | (1) Moscow State Institute of Steel and Alloys, Leninskii pr. 4, Moscow, 119991, Russia |
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| Abstract: | XPS data for thin (less than 100 nm) oxide films obtained by oxidation of Ni-4 Cr and Ni-12.5 Cr alloys at 500°C (0.5 h) are discussed. Thermodynamic analysis of 3 NiO + 2 Cr = Cr2O3 + 3 Ni solid-phase reaction is given, in which both the Gibbs energy change in the thermochemical process and the change in the interface energy at the alloy-oxide film boundary are taken into account. |
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