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Effect of V on High Temperature Oxidation of TiAl Alloy  

Morihiko Nakamura (Materials Analysis Station, National Institute for Materials Science)
Publication Information
Journal of the Korean institute of surface engineering / v.36, no.4, 2003 , pp. 329-333 More about this Journal
Abstract
The high-temperature oxidation behavior of Ti39Al-10V alloy that consisted primarily of $\beta$-Ti, ${\gamma}$-TiAl, and $\alpha_2$ $-Ti_3$Al phases was studied. The relatively thick and porous oxide scales formed consisted primarily of an outermost, thin TiO$_2$ layer, and an outer, thin $Al_2$$O_3$-rich layer, and an inner, very thick (TiO$_2$, $Al_2$$O_3$) mixed layer. Vanadium was present uniformly throughout the oxide scale. The formation and subsequent evaporation of V-oxides such as VO, $VO_2$, and $V_2$O$_{5}$ deteriorated oxidation resistance and scale adherence of the TiAl alloy significantly.y.
Keywords
TiAl; intermetallics; Oxidation; Vanadium;
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