| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1469977 | Corrosion Science | 2011 | 5 Pages |
This particular study includes the analysis of the effect of H2O on promoting the phase transformation in thermally grown aluminum oxides formed on NiAl at 950 °C. Oxidation of NiAl is carried out at 950 °C in O2 and O2 + 15 vol.% H2O. It is observed that transient alumina initially formed on NiAl transforms to stable α-alumina in the presence of water vapor which promotes the subject transformation and eventually results in a compact scale, offering superior oxidation resistance. Present study includes the analysis of θ to α-alumina transformation under the effect of temperature and environment.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► The oxidation dynamics of NiAl in both humid and dry air are investigated. ► Al2O3 grown on NiAl at 950 °C are characterized. ► θ-Al2O3 grown on NiAl in dry O2 is more stable than that in O2 + H2O. ► Effect of water vapor on the transformation of θ to α-alumina is discussed.
