Chemical and Phase Composition of Nanosize Oxide and Passive Films on Niframe0Cr Alloys. I. XPS Stud |
11.02.2009 г. |
Chemical and Phase Composition of Nanosize Oxide and Passive Films on NiCr Alloys. I. XPS Studies of Films Obtained by Alloy Oxidation In Air Yu. Ya. Andreev,* E. A. Skryleva, I. A. Safonov, and V. V. Dushik Moscow State Institute of Steel and Alloys, Leninskii pr. 4, Moscow, 119991 Russia * E-mail:
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Received April 9, 2008 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. PACS numbers: 81.65.Mq, 81.07.-b DOI: 10.1134/S2070205109010092
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