Details

Autor(en) / Beteiligte

• Wang, X.M.
• Zeng, X.Q.
• Zhou, Y.
• Wu, G.S.
• Yao, S.S.
• Lai, Y.J.

Titel

Early oxidation behaviors of Mg–Y alloys at high temperatures

Ist Teil von

• Journal of alloys and compounds, 2008-07, Vol.460 (1), p.368-374

Ort / Verlag

Lausanne: Elsevier B.V

Erscheinungsjahr

2008

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The early oxidation behaviors of Mg–Y alloys (Y = 0.82, 1.09, 4.31 and 25.00 wt.%) oxidized in pure O 2 have been investigated at high temperatures. The results showed that the oxidation behaviors of the Mg–Y alloys (Y = 4.31 and 25.00 wt.%) obeyed a parabolic law, while that of the Mg–Y (Y = 0.82 and 1.09 wt.%) exhibited both parabolic and linear kinetics depending on the oxidation temperature. Auger electron spectroscopy (AES), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and X-ray diffraction (XRD) analyses indicated that an oxide film with a single structure composed of MgO and Y 2O 3 had formed. Moreover, the higher the oxidation temperature was, the thicker the oxide film was. Finally, the corresponding oxidation mechanism has been discussed, and the improved oxidation resistance of the Mg–Y alloys can be due to the formation of a continuous Mg-dissolving Y 2O 3 protective film.