Oxidation and surface segregation of chromium in Fe–Cr alloys studied by M?ssbauer and X-ray photoelectron spectroscopy

摘要

The room temperature ~(57)Fe M?ssbauer and XPS spectra were measured for polycrystalline iron-based Fe–Cr alloys. The spectra were collected using three techniques: the transmission M?ssbauer spectroscopy (TMS), the conversion electron M?ssbauer spectroscopy (CEMS) and the X-ray photoelectron spectroscopy (XPS). The combination of these experimental techniques allows to determine changes in Cr concentration and the presence of oxygen in bulk, in the 300 nm pre-surface layer and on the surface of the studied alloys.