Protective Coatings for Niobium Alloys: Manufacture, Characterization and Oxidation Behaviour of (TiXCr)(7)Si-6 with X = Fe, Co and Ni
| Autor: | Lionel Aranda, Stéphane Mathieu, Léo Portebois, S. Knittel, Michel Vilasi |
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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) |
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Materials science
Niobium Intermetallic chemistry.chemical_element 02 engineering and technology [CHIM.INOR]Chemical Sciences/Inorganic chemistry Hot pressing 01 natural sciences Isothermal process Inorganic Chemistry Metal chemistry.chemical_compound Chromium 0103 physical sciences Silicide Materials Chemistry 010302 applied physics Metallurgy Metals and Alloys 021001 nanoscience & nanotechnology Chromia chemistry Chemical engineering visual_art visual_art.visual_art_medium 0210 nano-technology |
| Zdroj: | Oxidation of Metals Oxidation of Metals, Springer Verlag, 2013, 80 (3-4, SI), pp.243-255. ⟨10.1007/s11085-013-9376-0⟩ |
| ISSN: | 0030-770X 1573-4889 |
| DOI: | 10.1007/s11085-013-9376-0⟩ |
| Popis: | International audience; Intermetallic single phases (TiXCr)(7)Si-6 (with X = Fe, Co or Ni) were manufactured by uniaxial hot pressing. Their full characterization (SEM + XRD) highlighted that the nature of the metal constituent X influenced the chromium content in the silicide compositions. Both isothermal and cyclic oxidation studies at a temperature as high as 1300 A degrees C evidenced very low degradation rate for all compounds and lifetime at 1100 A degrees C exceeded 4700 cycles. All phases developed a duplex protective layer of chromia and silica. It was observed that the chromia:silica ratio depended on the nature of X, and, particularly for the Ni-containing specimen, also on the temperature. Co- and Ni-containing specimens developed pure chromia during oxidation whereas Fe ones develop (CrxFe1-x)(2)O-3, reducing drastically the CrO3 volatilization during exposure at temperature higher than 1000 A degrees C. |
| Databáze: | OpenAIRE |
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