The al-enriched γ’-Ni3Al-base bond coat for thermal barrier coating applications

Chen Liu, Ying Chen, Lin Qiu, Han Liu, Mingwen Bai, Ping Xiao

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A new Al-enriched γ’-Ni3Al bond coat was developed and its oxidation behaviour was examined and compared to that of conventional Pt-diffused γ/γ’ coatings and β-NiPtAl coatings. This γ’-Ni3Al coating exhibited significantly reduced elemental interdiffusion with the substrate during oxidation compared to two conventional coatings. Although Al-enriched γ’-Ni3Al coatings presented faster thermal grown oxide (TGO) growth than the β-NiPtAl coating, it outperformed β-NiPtAl coatings regarding the rumpling resistance during cycling. The Al-enriched γ’-Ni3Al coating also exhibited superior TGO spallation resistance compared to Pt-diffused γ/γ’ coatings. The mechanisms for the reduced interdiffusion and good rumpling resistance of this γ’-Ni3Al coating are addressed.
Original languageEnglish
Article number108523
JournalCorrosion Science
Volume167
Early online date5 Feb 2020
DOIs
Publication statusPublished - 1 May 2020
Externally publishedYes

Keywords

  • A. metal coatings
  • B. thermal cycling
  • B. Raman spectroscopy
  • C. Oxide coatings
  • C. oxidation

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