High Temperature Oxidation of Ti39.4Al10V Alloy
Alloys of Ti39.4Al10V (at.%) that consisted mainly of ordered β-Ti, γ-TiAl and α2-Ti3Al phases were oxidized at 700, 800, 900, and 1000oC in air. The oxide scales formed consisted largely of an outermost, thin TiO2 layer, an outer, thin Al2O3 layer, and an inner, very thick (TiO2+Al2O3) mixed layer. Vanadium, which was uniformly distributed throughout the oxide scale, harmfully decreased oxidation resistance, and made thick, nonadherent scales owing to the formation of low melting compounds of V-oxides. The oxidation progressed via the outward diffusion of Ti, Al and V ions, and the concurrent inward transport of oxygen.
S.-G. Kang and T. Kobayashi
D. B. Lee and Y.D. Jang, "High Temperature Oxidation of Ti39.4Al10V Alloy", Materials Science Forum, Vols. 449-452, pp. 813-816, 2004