A wustite phase in the form of a whisker conglomerate, which is metastable at room temperature, was found on the surface of nanoporous iron obtained by electrochemical dealloying (selective anodic dissolution of a less noble metal) of ferromanganese. Features of the further iron oxidation were studied by TG-DSC and X-ray phase analysis with a temperature sweep. A wide range of coexistence of three forms of iron oxides and relative stability of the magnetite phase up to 900 degrees C have been described.
展开▼
