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.