Structurally-phase characteristics of eutectic composites γ/γ′-NbC containing rhenium and ruthenium
Eutectic of nickel-base γ/γ′-NbC superalloy with natural composite structure of the system Ni - Al - Re - Ru - Nb - C ingots was produced by the method of high-gradient directional solidification. The investigations included: characterization of the eutectic composites superalloy microstructure, segregation of alloying elements along the composite zone of ingot, the influence of segregation of alloying elements on the physicochemical and structural parameters of eutectic composite superalloys (γ′-solvus temperature, solidus temperature, liquidus temperature, NbC-volume fraction, γ- and γ′-lattice parameters).