Performance and Thermal Stability of Pt-modified Al-diffusion Coatings for Superalloys under Cyclic and Isothermal Conditions
| Autor: | T. Weber, L. Peichl, A.D. Kennedy, A. Littner, P. Moretto, Fernando Pedraza, M. Schuetze |
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| Přispěvatelé: | Karl Winnacker Institute, DECHEMA, e.V., Laboratoire d'Etude des Matériaux en Milieux Agressifs (LEMMA), La Rochelle Université (ULR), SIFCO Turbine Components, JRC Institute for Energy and Transport (IET), European Commission - Joint Research Centre [Petten], MTU Aero Engines, European Project, Université de La Rochelle (ULR) |
| Jazyk: | angličtina |
| Rok vydání: | 2005 |
| Předmět: |
Materials science
Scanning electron microscope Electron microprobe 02 engineering and technology engineering.material 01 natural sciences Isothermal process Coating 0103 physical sciences Materials Chemistry Thermal stability Composite material 010302 applied physics superalloys Mechanical Engineering Metallurgy Metals and Alloys [CHIM.MATE]Chemical Sciences/Material chemistry Microstructure 021001 nanoscience & nanotechnology Condensed Matter Physics Superalloy Mechanics of Materials Pt-Al diffusion coatings engineering Ceramics and Composites 0210 nano-technology oxidation protection Single crystal |
| Zdroj: | Materials at High Temperatures Materials at High Temperatures, Taylor and Francis, 2005, 22 (3-4), pp.411-420. ⟨10.1179/mht.2005.048⟩ Scopus-Elsevier |
| ISSN: | 0960-3409 1878-6413 |
| DOI: | 10.1179/mht.2005.048⟩ |
| Popis: | In this paper, the influence of the platinum content on the cyclic oxidation resistance at 1150°C of Pt-aluminide coatings deposited on a single crystal Ni-based superalloy is reported. The different coatings involve the well-known bi-phase (Ni,Pt)Al and PtAl2 as well as single phase (Ni,Pt)Al coatings with various compositions and microstructures. The results showed that the cyclic oxidation performance depends strongly on the average Pt-content present in the coating and, to a lesser extent, on the coating microstructure. Moreover, no relevant effect of the Al content could be evidenced. Surface deformation occurred during exposure and was attributed to phase transformations within the coating. This assumption was confirmed by isothermal experiments between 1050 and 1200°C. Post-experimental investigations of tested specimens were performed by optical and scanning electron microscopy, X-ray diffraction and EPMA. |
| Databáze: | OpenAIRE |
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