Thermophysical properties and deposition of B2 structure based Al–Ni–Ru–M alloys

Thermal and physical properties of Al–Ni–Ru–M alloys

“…It should be noted that, with the exception of a few Al-Ni-Ru-M alloys, there is no experimental evidence with which our results could be compared. For M = Fe, three alloys were studied by Vjunitsky et al [1,2] Cr 3.5 , and the modeling shows two clearly distinct domains in the computational cell with the same ratio of Ru to Ni atoms as that observed experimentally. Lastly, the Al 50 Ni 37 Ru 10 Si 3 alloy [1] shows no phase separation, in agreement with the theoretical results.…”

“…As a compromise between the different factors to be considered in expanding the available options, Ru and Ir aluminides have become interesting candidates for high temperature coating applications due to their lower cost, corrosion resistance, stability, and good mechanical and thermal properties. Due to the usually large field of homogeneity of B2 phases in multicomponent systems, and considering the large Ni-content of the typical substrate materials to which these coatings are applied, the study of Al-Ni-Ru-M alloys with B2 structures has led to significant advances in this area [1,2]. Different options for M have been considered, but once the research moves into the realm of complex systems with many elements, the experimental background is rather small, as the options are too numerous to fit within traditional experimental programs.…”

“…This has also been the subject of extensive theoretical and experimental work by other groups. More recently, pioneering theoretical work was performed on the Al-Ni-Ru-Pt system [16] as well as the experimental analysis of Al-Ni-Ru-M (M = Ir, Fe, Cr, Si) alloys [1,2], setting the foundation for the work presented here.…”

Thermal and physical properties of B2 Al–Ir–X (X=Ni, Ru, Pd, Co, Fe) alloys

“…These studies have been recently extended to consider quaternary Al-Ni-Ru-M systems (with M ¼ Ir, among others) [13][14][15]. In line with all the aforementioned studies, some work has been done on the Al-Ir-Pd and Al-Ir-Os ternary systems to investigate alternative options for improving the melting point of Ir-based materials, as well as a more complete understanding of ternary additions of the platinum metals group [16,17].…”

“…Concentrating on AlRu alloys, the inherent brittleness usually associated with intermetallic bonding, sparked interest on B2 AlIrbased alloys as such problem can be countered with the presence of a second phase triggered by the addition of small amounts of an element that improves ductility [9][10][11][12][13]. The Al-Ir system was selected for further study [9] due to its high temperature strength and reasonable toughness at room temperature [10].…”