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Description:

The effects of reactive elements (RE) in MCrAlX alloy (M: Metals, X: RE) as the bond coat for thermal barrier coatings durability were investigated by both experimental evaluation and density functional theory (DFT) calculations. Cyclic oxidation tests showed that the lifetime of the sample with Y, Hf, and Si as RE displayed approximately twice of the sample with Y only. Furthermore, the interface energies between oxide (α-Al2O3) and bond coat with various RE (Si, Sc, Ti, Y, Zr, Hf, La, and Ce) were calculated by DFT. DFT results indicate that Hf and Si doping effectively reduce the interface energy.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: Thermal barrier coatings, High temperature oxidation, Thermally grown oxide, Reactive elements, First principles calculation

Date published: 2024-08-02

Publisher: Elsevier BV

Journal:

• Corrosion Science (ISSN: 0010938X) vol. 237 p. 112329-112329 112329

Funding:

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1016/j.corsci.2024.112329

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Updated at: 2024-09-02 16:30:30 +0900

Published on MDR: 2024-09-03 08:30:09 +0900