The influence of yttrium additions on the oxidation resistance of a directionally solidified Ni-Al-Cr3C2 eutectic alloy

Significantly improving the oxidation and spallation resistance of a MCrAlY alloy by controlling the distribution of yttrium

“…It is well established that the oxidation performance of MCrAlY alloys is substantially affected by the minor additions (＜1 wt%) of reactive element (RE) Y, i.e., so called reactive element (RE) effect [6][7][8][9]. The primary mechanisms of RE-effect are elaborated as follows: (1) Y actively reacts with and ties up sulfur, which prevents the interfacial segregation and slows down the degradation of interfacial toughness [10][11][12][13]; (2) The outward transport of Al is suppressed due to the "block effect" induced by segregation of Y to the TGO grain boundaries, thus lowering the TGO growth rate [12].…”

High-temperature corrosion behavior of Ni–16Mo–7Cr–4Fe superalloy containing yttrium in molten LiF–NaF–KF salt

“…Some reports exist on yttrium modification in the nickel-base alloys [9][10][11][12]. Yttrium can improve many properties, such as the oxidation resistance of alloys [9], the creep property of cast stainless steels [10], the stress rupture of nickel-based superalloys [11,12] and so on. This paper deals with the effects of yttrium on the corrosion resistance of Ni-16Mo-7Cr-4Fe alloy containing various yttrium contents after their exposure to the molten FLiNaK (LiF-NaF-KF: 46.5-11.5-42 mol%) salt at 850°C for 620 h, and the influence mechanism is also discussed.…”

“…Yttrium has been applied successfully in many fields such as metallurgy and chemical and surface engineering [8]. Some reports exist on yttrium modification in the nickel-base alloys [9][10][11][12]. Yttrium can improve many properties, such as the oxidation resistance of alloys [9], the creep property of cast stainless steels [10], the stress rupture of nickel-based superalloys [11,12] and so on.…”

Structural properties and cyclic oxidation behavior of Ni-Al-Y superalloys

“…The effect of a minor amount (typically less than 0.5 wt.%) of Y addition on the microstructure, mechanical properties, and oxidation behavior of Ni-based superalloys and some alumina-forming alloys is investigated in a series of experimental studies [30,[32][33][34][35][36][37][38]. These studies reported that a minor amount of Y addition reduced the oxidation rate and enhanced the inherent strength of the superalloy/oxide interface.…”