Abstract
The paper investigates the influence of oxidation atmosphere on the corrosion behaviour after 7, 15, and 24 h of different zirconium-based materials, including pure metal, E110, and Zircaloy-2 alloys. The study utilises scanning electron microscopy to perform cross-sectional characterisation. Raman imaging was employed to determine the content and distribution of the tetragonal phase in the oxide scale depending on oxidation parameters. The obtained results were compared with previous thermogravimetric measurements and correlated with stress distribution calculated based on the shift of the selected tetragonal phase band. Additionally, the study reveals a relaxed tetragonal phase in a bulk monoclinic phase. A thorough analysis of Raman spectra allowed correlating spectral features with tetragonal phase stabilisation mechanisms for the tetragonal phase occurring at the metal/oxide interface and in the bulk monoclinic phase.
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