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Naffati M, Zanna S, Cornette P, Costa D, Marcus P, Abderrabba MM, Somrani S. Adsorption of phenyl phosphate on Ni-Cr alloy surface: Experimental and theoretical investigations. PHOSPHORUS SULFUR 2018. [DOI: 10.1080/10426507.2017.1395877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- M. Naffati
- Université de Tunis, Matériaux et Environnement (UR15ES01), Institut Préparatoire aux Etudes d'Ingénieurs, 2 Rue Jawaher Lel Nahru, Montfleury, Tunis, Tunisie
| | - S. Zanna
- Laboratoire de Physico-Chimie des Surfaces, CNRS-ENSCP (UMR 7045), Ecole Nationale Supérieure de Chimie de Paris, 11 rue P. et M. Curie, Paris, France
| | - P. Cornette
- Laboratoire de Physico-Chimie des Surfaces, CNRS-ENSCP (UMR 7045), Ecole Nationale Supérieure de Chimie de Paris, 11 rue P. et M. Curie, Paris, France
| | - D. Costa
- Laboratoire de Physico-Chimie des Surfaces, CNRS-ENSCP (UMR 7045), Ecole Nationale Supérieure de Chimie de Paris, 11 rue P. et M. Curie, Paris, France
| | - P. Marcus
- Laboratoire de Physico-Chimie des Surfaces, CNRS-ENSCP (UMR 7045), Ecole Nationale Supérieure de Chimie de Paris, 11 rue P. et M. Curie, Paris, France
| | - M. M. Abderrabba
- Laboratoire Matériaux et Applications, Institut Préparatoire aux Etudes Scientifique et Technologique de Tunis, BP51, La Marsa, Tunisie
| | - S. Somrani
- Université de Tunis, Matériaux et Environnement (UR15ES01), Institut Préparatoire aux Etudes d'Ingénieurs, 2 Rue Jawaher Lel Nahru, Montfleury, Tunis, Tunisie
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Abstract
Modeling the growth and failure of passive oxide films formed on stainless steels is of general interest for the use of stainless steel as structural material and of special interest in the context of life time extension of light water reactors in nuclear power plants. Using the DFT+U approach, a theoretical investigation on the resistance to failure of the chromium-rich inner oxide layer formed at the surface of chromium-containing austenitic alloys (stainless steel and nickel based alloys) has been performed. The investigations were done for periodic bulk models. The data at the atomic scale were extrapolated by using the Universal Binding Energy Relationships (UBERs) model in order to estimate the mechanical behavior of a 10 μm thick oxide scale. The calculated stress values are in good agreement with experiments. Tensile stress for the bulk chromia was observed. The effects of temperature and structural defects on cracking were investigated. The possibility of cracking intensifies at high temperature compared to 0 K investigations. Higher susceptibility to cracking was observed in presence of defects compared to nondefective oxide, in agreement with experimental observation.
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