| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1471660 | Corrosion Science | 2008 | 8 Pages |
The present paper focuses on the investigation of the relationship between microstructure of Fe3Al prepared by hot isostatic pressing (HIP) and kinetics of alumina layer formation during oxidation at 900 °C, 1000 °C and 1100 °C. As prepared HIPed Fe3Al sample reveals lamellar microstructure with inhomogeneous Al distribution which originates from the preliminary mechanical activation of Fe–Al mixture. At 900 °C, Fe3Al oxidation is characterized by selective growth of very rough alumina layer containing only transient aluminium oxides. In addition to these transient oxides, α-Al2O3 stable phase is formed at 1000 °C. At the highest temperature (1100 °C), continuous and relatively smooth alumina layer mainly contains fine crystallites of α-Al2O3. The initial lamellar structure and phase inhomogeneity in as-HIPed Fe3Al samples are supposed to be the main factors that determine observed peculiarities after Fe3Al oxidation at 900 °C and 1000 °C.
