High-temperature oxidation behavior of TiAl-based alloys fabricated by spark plasma sintering

High-temperature behaviour of Ti–Al–Si alloys produced by reactive sintering

“…To improve the high-temperature oxidation behaviour of these materials, additions of various alloying elements are applied. Positive effects of niobium and tantalum on high-temperature oxidation resistance were already described [2,3]. However these heavy elements undesirably increase the density and cost.…”

Thermodynamic modeling of the Ti–Al–Cr ternary system

“…␥-TiAl based alloys are considered as the candidate materials for elevated temperature applications, engineering materials in the aviation and automotive industry, for their numerous advantages such as low density, good oxidation resistance, and attractive high temperature property, they have been widely studied in the latest years [1][2][3][4][5][6][7][8][9]. The studies of structure and some properties of Ti-Cr alloys and the formation of nanocomposites containing Al and TiAl 3 in Ti-Al alloys are also reported in recent years [10][11][12].…”

Microstructure, mechanical properties, hot deformation and oxidation behavior of Ti–45Al–5.4V–3.6Nb–0.3Y alloy

“…The poor oxidation resistance of TiAl alloys above 800 • C is due to the fact that they cannot form a long-lasting protective alumina scales [23,24]. One effective measure to improve the oxidation resistance of TiAl alloy is to promote the formation of a dense and alternating alumina scale through adding alloy elements, so that the diffusion of Ti 4+ and O 2− can be impeded.…”

“…For Ti-45Al-5.4V-3.6Nb-0.3Y alloy, several nearly dense and consecutive Al 2 O 3 layers form in the oxidation scale during cyclic oxidation at 800 • C, which can ameliorate the oxidation resistance. According to the oxidation kinetics [24], the formation rate of Ti oxides is higher than that of alumina. Consequently, TiO 2 is preferentially formed in the external scale.…”