Oxidation of high-temperature coatings

H. E. Evans*, M. P. Taylor

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)


Nickel-based superalloys used in stressed situations at high temperatures tend to be optimized for mechanical properties and have insufficient aluminium to form a continuous surface layer in service to provide long-term protection against oxidation. This deficiency can be met through the use of coatings that have higher aluminium contents and which form a protective alumina layer during service. These can take the form of metallic overlays or diffusion coatings, both of which can also form a bondcoat layer within thermal barrier coatings (TBCs). Factors which lead to loss of aluminium through oxidation and interdiffusion are discussed in this article. A consequence of excessive aluminium depletion is the formation of non-protective oxides which can be particularly deleterious in TBCs.

Original languageEnglish
Pages (from-to)1-10
Number of pages10
JournalProceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering
Issue number1
Publication statusPublished - 2006


  • Aluminium depletion
  • Diffusion coatings
  • Overlay coatings
  • TBCs

ASJC Scopus subject areas

  • Aerospace Engineering
  • Mechanical Engineering


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