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Structural transformations in heat-resistant protective coatings on nickel alloys

  • High-Temperature Steels And Alloys
  • Published:
Metal Science and Heat Treatment Aims and scope

Conclusions

  1. 1.

    Increase of atmosphere corrosivity and operating temperature for components with heat-resistant aluminide coatings leads to an increase in the role of phase instability in coating failure.

  2. 2.

    Diffusion processes occuring during operation cause impoverishment of the β-phase (NiAl) of aluminosilicide coatings in alloying elements and its destabilisation.

  3. 3.

    Aluminosilicide coatings on alloys with a high chromium content may be used effectively in a corrosive gas atmosphere with retention at temperatures which do not lead to martensitic transformation.

  4. 4.

    Co−Cr−Al-Y coatings compared with Al−Si and Al−Nb−Si coatings have a greater stability and better corrosion resistance during operation in combustion products with a high sulfur content.

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Literature cited

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Authors
  1. Yu. G. Veksler
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  2. V. P. Lesnikov
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  3. S. Ya. Paleeva
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  4. E. G. Lesnikova
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  5. G. F. Myal'nitsa
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Additional information

Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 4, pp. 45–50, April, 1987.

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Veksler, Y.G., Lesnikov, V.P., Paleeva, S.Y. et al. Structural transformations in heat-resistant protective coatings on nickel alloys. Met Sci Heat Treat 29, 302–307 (1987). https://doi.org/10.1007/BF00769431

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  • DOI: https://doi.org/10.1007/BF00769431

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