High-temperature characterization of reactively processed nanostructure nickel aluminide intermetallics

Archives of Thermodynamics

“…However, particular emphasis should be placed on the generating the additional terms necessary for the modeling of surface catalytic reactions [24,25]. The model of the catalytic reaction of methanol decomposition on the surface of alloys based on the intermetallic phase of Ni 3 Al has been described in the previous studies by Moussa and El-Shall [11] and Xu et al [25]. The best example of catalytic reaction is combustion in a honeycombed set of microchannels, which has been described in a previous study by Jóźwik et al [13].…”

“…Additionally, these materials retain sufficient strength at elevated temperatures and are relatively easy to be formed [10]. According to literature, Ni 3 Al intermetallic thin foils exhibit extremely high catalytic properties in hydrocarbon decomposition reactions [11]. One example of an alloy foil package based on the intermetallic phase Ni 3 Al, constructed as a rolled up honeycomb structure, is shown in Fig.…”

Reactive processing of nanostructured nickel aluminide intermetallics starting from elemental nanopowders

“…Also, a complete study of the effect of micro-alloying additions of B and Nb on the high temperature oxidation/sulfidation of reactively processed Ni 3 Al and NiAl from elemental nanopowders is currently in press elsewhere [42]. Clearly the formation of nanostructure grains increased the strength dramatically.…”

Electron Backscatter Diffraction Study on Microstructure, Texture, and Strain Evolution in Armco Iron Severely Deformed by the Differential Speed Rolling Method

“…[3] Furthermore, a large fraction of high-angle grain boundaries (HAGBs) in a volume of bulk material is a key factor in the faster kinetics of diffusion-based phenomena leading to, e.g., better corrosion resistance of UFG materials, as compared to their coarse-grained counterparts. [4] Severe plastic deformation (SPD) methods are one of the most efficient ways to produce bulk UFG metals. In these techniques, an extremely high strain is imposed on a material in order to obtain the structure refinement effect through formation of intersected shear bands [5] or a dynamically activated recovery or recrystallization process.…”