Abstract
The phase compositions at the surface of Fe94Si6 alloy samples were investigated. The phase analyses of the surfaces of samples annealed in vacuum, oxygen, and argon atmospheres were performed by Mossbauer spectroscopy and photoelectron spectroscopy (XPS). The formation of pure alpha-Fe, fayalite, hematite, and magnetite was observed in dependence on surface preparation and chemical composition of surrounding atmospheres during heat treatments.