In Situ Oxide Growth Characterization of Mn-Containing Ni–25Cr (wt%) Model Alloys at 1050 °C
| Autor: | T. Perez, Renaud Podor, Michel Vilasi, Yves Wouters, Laurence Latu-Romain, Stéphane Mathieu, J. Lautru, Y. Parsa |
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| Přispěvatelé: | Institut Jean Lamour (IJL), Université de Lorraine (UL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Science et Ingénierie des Matériaux et Procédés (SIMaP ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Etude de la Matière en Mode Environnemental (L2ME), Institut de Chimie Séparative de Marcoule (ICSM - UMR 5257), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de Chimie du CNRS (INC)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Analytical chemistry Oxide chemistry.chemical_element 02 engineering and technology Manganese engineering.material 01 natural sciences Inorganic Chemistry chemistry.chemical_compound 0103 physical sciences Materials Chemistry [CHIM]Chemical Sciences Environmental scanning electron microscope ComputingMilieux_MISCELLANEOUS 010302 applied physics Spinel Metallurgy Metals and Alloys 021001 nanoscience & nanotechnology Chromia Thermogravimetry chemistry engineering Grain boundary Crystallite 0210 nano-technology |
| Zdroj: | Oxidation of Metals Oxidation of Metals, Springer Verlag, 2018, 89 (5-6), pp.781-795. ⟨10.1007/s11085-017-9819-0⟩ Oxidation of Metals, 2018, 89 (5-6), pp.781-795. ⟨10.1007/s11085-017-9819-0⟩ |
| ISSN: | 0030-770X 1573-4889 |
| DOI: | 10.1007/s11085-017-9819-0⟩ |
| Popis: | The oxidation behaviour of four model alloys with the composition Ni–25Cr–xMn (with x = 0, 0.5, 1 and 1.5 wt%) was investigated at 1050 °C in air by thermogravimetry and by in situ observations in an environmental scanning electron microscope (ESEM). The addition of manganese modifies the oxidation rate of Ni–25Cr alloys by (1) increasing the parabolic constant k p compared to that for Ni–25Cr and (2) lowering the short-time oxidation rate. Regardless of the Mn concentration, in situ ESEM observations indicated the formation of spinel crystallites from the very beginning of the oxidation process. The size of the spinel crystallites was directly linked to the initial Mn concentration. The obtained results suggested that the formation of the spinel layer at the top of the chromia oxide scale rather than at the metal–oxide interface as thermodynamically expected must be attributed to the higher diffusion rate of Mn than Cr both in the lattice and at the grain boundary. |
| Databáze: | OpenAIRE |
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