Oxidation behavior of ferritic stainless steels in simulated automotive exhaust gas containing 5 vol.% water vapor
| Autor: | M.Y. Ma, L.Q. Chen, Raja Devesh Kumar Misra, Liangliang Wei, H.L. Liu |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Scanning electron microscope 020209 energy Metallurgy technology industry and agriculture Oxide chemistry.chemical_element 02 engineering and technology Electron microprobe Tungsten Atmospheric temperature range 021001 nanoscience & nanotechnology Condensed Matter Physics Metal Cerium chemistry.chemical_compound Chromium chemistry visual_art 0202 electrical engineering electronic engineering information engineering visual_art.visual_art_medium General Materials Science 0210 nano-technology |
| Zdroj: | Materials Chemistry and Physics. 205:508-517 |
| ISSN: | 0254-0584 |
| DOI: | 10.1016/j.matchemphys.2017.11.051 |
| Popis: | In this study, the effect of alloying elements, cerium (Ce) and tungsten (W), on the oxidation behavior of medium chromium ferritic stainless steel in simulated automotive exhaust gases containing 5 vol.% H2O was studied in the temperature range of 950–1100 °C for 5 h. The oxidation kinetics and oxide film characteristics were analyzed by means of thermo-gravimetric analysis (TGA), X-ray diffraction (XRD), scanning electron microscope (SEM) and elemental probe micro-analyzer (EPMA). The growth rate of oxidation and oxidation mass gain were significantly decreased on the addition of Ce. A dense, uniform, and thin oxide scale formed on Ce-containing steels. The steel containing Ce and ∼0.5 wt% W displayed similar oxidation behavior compared to the steel containing only Ce. A large number of cracks and pores existed in the oxide film and oxide/metal interface leading to the spallation of oxide film, when the addition of W reached ∼1.0 wt%. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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