Physicochemical laws of the interaction of nickel aluminides with alloying elements: I. Formation of nickel aluminide-based solid solutions

Microstructure, Mechanical Properties and Tribological Properties of NiAlComposites Reinforced by CrMnFeCoNiHigh-Entropy Alloy

“…Because the atomic radius of Cr (0.1249 nm), Mn (0.1366 nm), Fe (0.1241 nm), and Co (0.1253 nm) are close to Ni (0.1246 nm) and Al (0.1432 nm). Transition metal elements, such as Fe and Ti, alloying decreases the solubility of Al and increases the solubility of Ni in NiAl [ 24 , 25 ]. Under the high temperature sintering condition, the reaction diffusion occurred between the two phases’ interfaces.…”

Formation of Diffusion Zones in Coated Ni-Al-X Ternary Alloys and Ni-Based Superalloys

“…The solubility of both Re and Ta into δ-Ni 2 Al 3 and β-NiAl phase is much smaller than that of Cr [10,[24][25][26][27][28]. Specifically, the Re solubility in the β-NiAl phase is 0.53 at.% in the as cast condition [24], and 0.5 at.% in δ-Ni 2 Al 3 [28]. Therefore, Re rejected from the β-NiAl and δ-Ni 2 Al 3 phases and forms Re-rich phase precipitates, as observed in Fig.…”

“…With respect to Ta, the low solubility in the β phase, which is less than 1 at.% [28], contributed to the formation of discrete particles in the coating layer and diffusion zone. In particular, a variety of precipitates and intermetallic compounds have been reported in the Ni-Al-Ta system [25,30].…”

Structure And Properties Of Condensed Gradient Metal-ceramic Thermal Barrier Coatings With Nial-bond Coat Alloyed With Y, Hf, Dy

“…Известно, что добавки АЭ имеют ограниченную растворимость в NiAl: иттрий и диспрозий практически не растворяются [16], а раствори-мость гафния не превышает 1,3 % (при 1100 о С) и 2,9 % (при 1200 о С) [16][17][18]. Вводимые в жаростойкий связующий слой NiAl добавки АЭ выделяются как внутри зерен, так и по границам в виде двойных или тройных интерметаллидных фаз.…”