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http://dx.doi.org/10.3740/MRSK.2002.12.11.845

Characterization of Oxide Scales Formed on Fe3Al, Fe3Al-Cr, Fe3Al-Cr-Mo, Ni3Al and Ni3Al-Cr Alloys  

Shim, Woung-Shik (Center for Advanced Plasma Surface Technology, Sungkyunkwan University)
Lee, Dong-Bok (Center for Advanced Plasma Surface Technology, Sungkyunkwan University)
Publication Information
Korean Journal of Materials Research / v.12, no.11, 2002 , pp. 845-849 More about this Journal
Abstract
Alloys of $Fe_3$Al, $Fe_3$Al-6Cr, $Fe_3$Al-4Cr-1Mo, $Ni_3$Al, and $Ni_3$Al-2.8Cr were oxidized at $1000^{\circ}C$ in air, and the oxide scales formed were studied using XRD. SEM, EPMA, and TEM. The oxide scales that formed on $Fe_3$Al-based alloys consisted primarily of $\alpha$-$Al_2$$O_3$ containing a small amount of dissolved Fe and Cr ions, whereas those that formed on $Ni_3$Al-based alloys consisted primarily of $\alpha$-$Al_2$$O_3$, together with a small amount of $NiAl_2$$O_4$, NiO and dissolved Cr ions. For the entire alloys tested, nonadherent oxide scales formed, and voids were inevitably existed at the scale-matrix interface.
Keywords
$Fe_3$Al; $Ni_3$Al; Oxidation; Chromium; Aluminum;
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