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<p>The kinetics of oxidation of Ni (Ni + Co)–NbC superalloys represented by the alloy Ni–NbC and (Ni + Co)–NbC was studied. The alloys were studied in the cast state. It was found that the alloys oxidize according to a parabolic law. The analysis of diffusion–oxidation processes at a temperature of 1100℃ in air indicates an increase in heat resistance as a result of intensification of scale sintering and the formation on the surface of superalloys of a diffusion barrier layer of chromium, aluminum, and niobium oxides. The research result determines the prospects of creating industrial alloys for power engineering based on Ni (Ni + Co)–NbC superalloys.</p> Graphical abstract <p></p>

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Oxidation kinetics of eutectic superalloys Ni (Ni + Co)–NbC at 1100℃

  • 期刊论文

  • 发表日期：

    2024年12月31日

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  • G. P. Dmytrieva,
  • T. S. Cherepova,
  • T. V. Pryadko,
  • Yu. S. Semenova

摘要

The kinetics of oxidation of Ni (Ni + Co)–NbC superalloys represented by the alloy Ni–NbC and (Ni + Co)–NbC was studied. The alloys were studied in the cast state. It was found that the alloys oxidize according to a parabolic law. The analysis of diffusion–oxidation processes at a temperature of 1100℃ in air indicates an increase in heat resistance as a result of intensification of scale sintering and the formation on the surface of superalloys of a diffusion barrier layer of chromium, aluminum, and niobium oxides. The research result determines the prospects of creating industrial alloys for power engineering based on Ni (Ni + Co)–NbC superalloys.

Graphical abstract