Effect of silicon and niobium on oxidation resistance of TiAl intermetallics

Influence of Y-addition on the oxidation behavior of Al-rich γ-TiAl alloys

“…In the past few years a great deal of research work involving alloying, surface coating and ion implantation has been carried out to improve the oxidation resistance of TiAl-based alloys [3]. The effects of several alloying elements such as Nb, Mo, V, Si, Cl, Cr and Mn on the oxidation resistance have been assessed [4][5][6][7][8][9][10]. Studies have been done on rare-earth elements of Y and Er, and both beneficial and detrimental effects have been reported, closely depending on test conditions such as alloying compositions, fabrication process, microstructures, and oxidation environments and so on.…”

The improvement of high-temperature oxidation of α2-Ti3Al by anodic coating in the phosphoric acid with sodium silicate

“…However, the anodic coatings formed in phosphoric acid exhibit limited resistance against high-temperature oxidation for a 2 -Ti 3 Al. It was reported that the Si addition can promote the formation of a compact TiO 2 and SiO 2 in the oxide scale acted as a barrier against the oxidation [5]. Therefore, Si and P are beneficial elements for the high-temperature oxidation resistance of a 2 -Ti 3 Al alloy.…”

Dynamic Fracture Initiation Toughness of a Gamma (Met-PX) Titanium Aluminide at Elevated Temperatures

“…[15] Other alloying elements such as Si, Cr, and V were also found to improve the oxidation resistance. [16,17] With regard to the oxide scale effects on the mechanical properties, Cheng [18] and Huang et al [19] studied the effect of thermal exposure at 700°C for up to 3000 hours on the stability of various gamma microstructures. Although they saw evidence of microstructural instability, they did not see any degradation in the mechanical properties of these alloys.…”