Refractory (Tm = 2100 °C), heat-resistant ruthenium monoaluminide RuAl, lighter (ρ = 7.97 g/cm3) than Ni superalloys, is considered as a promising candidate material for operation at high temperatures and relatively low loads in high-speed gas oxidizing flows at temperatures higher not only the twork, but also the melting point of both nickel superalloys and nickel and titanium aluminides. RuAl is also an ideal candidate for potential use in protective coatings. In the second part of the article, the possibilities of obtaining alloys based on RuAl directly from the initial powders of ruthenium and aluminum are considered by combining the temperature-time modes of reaction sintering (RS), the sequence and intensity of pressure application during RS, without the use of specialized equipment for obtaining initial powders of a given composition and without restrictions on the particle size distribution of the original powders.
