Abstract
The development of internal stress and texture in the oxide scales grown on Fe–15at.% Al (100) and (111) single crystals at 700°C was determined in situ using synchrotron X-ray diffraction. At this low oxidation temperature oxide scale thickness as revealed by X-ray photoelectron spectroscopy and transmission electron microscopy was situated between 100 and 150nm after 650min oxidation. Trigonal α-Fe2O3 was found to act as a crystallographic template for the nucleation of isostructural α-Al2O3. Strain behavior during oxidation was found to be influenced by the epitaxial relationship between α-Al2O3 and α-Fe2O3.
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