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Raman spectroscopy analysis of cross-sectioned ferritic Cr-Mo-V steel T91 (UNS: K90901) after oxidation at 1200 C for 2 h in air and steam

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posted on 02.01.2020 by Trishelle Copeland-Johnson, Nicola Bowler, Charles Nyamekye, Emily A. Smith, Raúl Rebak, Simerjeet Gill, Lynne Ecker
Raman images and energy dispersion x-ray spectroscopy (EDS) elemental analysis maps acquired from a cross-sectioned segment of ferritic Cr-Mo-V steel T91 (UNS: K90901) after oxidation in air at 1200 C for 2 h. Raman data was collected using a WITec alpha 300R micro-imaging Raman microscope. EDS data was collected using a JEOL 7600F scanning electron microscope equipped with an Oxford Instruments EDS 80 mm2 X-Max silicon drift detector (129 eV resolution) operated through the INCATM software suite. Results from Raman and EDS corroborates, identifying the chemical formula of an Cr-Fe oxide compound observed in the cross-section as Fe(3-x)CrxO4.

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