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Heat-Resistant RuAl-Based Alloys: Part I. Cast Alloys

  • PHYSICOCHEMICAL PRINCIPLES OF CREATING MATERIALS AND TECHNOLOGIES
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Inorganic Materials: Applied Research Aims and scope

Abstract

Refractory ruthenium monoaluminide RuAl, a heat-resistant material with the melting point tmp = 2100°C, lighter than nickel superalloys—the density ρ = 7.97 g/cm3—is considered to be a promising candidate for high-temperature applications under relatively low loads in high-speed oxidizing gas flows at temperatures higher than not only the operating (top) but also the melting (tmp) temperatures of both nickel superalloys and nickel and titanium aluminides. RuAl is also an ideal candidate for protective coatings of critical components of the hot gas path of gas turbine and rocket engines. In the first part of the article, the authors consider the principles of selecting the alloying systems and the methods for production of single-phase or heterophase RuAl cast alloys and changes in their structural and phase states under cold and hot deformation and provide data on the mechanical properties within a wide range of temperatures, the oxidation resistance and the resistance to some corrosive media, and the plasma erosion resistance.

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ACKNOWLEDGMENTS

This work was performed according to a state assignment, project no. 075-00746-19-00.

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Authors and Affiliations

  1. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, 119334, Moscow, Russia

    K. B. Povarova & A. E. Morozov

  2. Bardin Central Research Institute of Iron and Steel Industry, 105005, Moscow, Russia

    A. A. Drozdov

Authors
  1. K. B. Povarova
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  2. A. E. Morozov
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  3. A. A. Drozdov
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Correspondence to K. B. Povarova, A. E. Morozov or A. A. Drozdov.

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Translated by O. Lotova

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Povarova, K.B., Morozov, A.E. & Drozdov, A.A. Heat-Resistant RuAl-Based Alloys: Part I. Cast Alloys. Inorg. Mater. Appl. Res. 11, 277–286 (2020). https://doi.org/10.1134/S2075113320020318

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