Microstructural investigation using advanced TEM techniques of inner oxide layers formed on T92 steel in oxyfuel environment
| Autor: | Nicole Wollschläger, K. Chandra, Axel Kranzmann, I. Dörfel |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
020209 energy General Chemical Engineering Metallurgy Spinel Alloy Oxide Energy-dispersive X-ray spectroscopy 02 engineering and technology General Chemistry engineering.material 021001 nanoscience & nanotechnology Microstructure Corrosion chemistry.chemical_compound chemistry Scanning transmission electron microscopy 0202 electrical engineering electronic engineering information engineering engineering General Materials Science Wüstite 0210 nano-technology |
| Zdroj: | Corrosion Science. 148:94-109 |
| ISSN: | 0010-938X |
| DOI: | 10.1016/j.corsci.2018.12.008 |
| Popis: | T92 steel was oxidized at 650 °C for 1000 h in dry and wet oxyfuel gases. The microstructure of inner oxide layer was investigated using scanning transmission electron microscopy and energy dispersive spectroscopy on thin lamellas of oxide cross-sections. The oxides were composed of fine equiaxed grains and separated into Fe-rich and Cr-rich regions. Fe-rich regions were wustite and iron sulphide while Cr-rich regions consisted of Fe-Cr spinel with different stoichiometries. Precipitates of (W,Mo)-rich oxides were formed within the oxide scale and beneath the oxide/alloy interface. Often iron sulphide and (W,Mo)-rich oxide were surrounded by Cr-rich spinel. |
| Databáze: | OpenAIRE |
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