Mo–Nb–Si–B Alloy: Synthesis, Composition, and Structure

Cast refractory alloys Mo–Nb–Si–B were prepared by centrifugal self-propagating high-temperature synthesis (SHS) from metallothermic mixtures containing MoO3, Nb2O5, Al, Si, and B powders, additive of Al2O3 as a temperature-moderating chemically inert agent. Variation in the acceleration amount affected composition structure cast alloys. In wide range values, combustion temperature was found to exceed 3000 K, products obtained two-layer ingots target alloy (lower) slag (upper).