Oxidation and Hot Corrosion Behavior of Thermal Barrier Coatings-A Brief Review

Oxidation and hot corrosion occur on metallic parts of gas turbines on account of exposure to high temperature. Thermal barrier coatings (TBCs) are used to protect gas turbine components made of Ni-based superalloys from high temperature oxidation as well as hot corrosion. The stability of coated me...

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Bibliographic Details
Published in:High temperature corrosion of materials 2023-06, Vol.99 (5-6), p.331-343
Main Authors: Roy, Pallabi, Ghosh, Sumana
Format: Article
Language:English
Subjects:
Coatings
Corrosion
Gas turbines
High temperature
Hot corrosion
Inlet temperature
Nickel base alloys
Oxidation
Spallation
Superalloys
Thermal barrier coatings
Turbines
Yttria-stabilized zirconia
Zirconium dioxide
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Summary:Oxidation and hot corrosion occur on metallic parts of gas turbines on account of exposure to high temperature. Thermal barrier coatings (TBCs) are used to protect gas turbine components made of Ni-based superalloys from high temperature oxidation as well as hot corrosion. The stability of coated metallic gas turbine components is higher than that of non-coated ones. Suitable coating is crucial for obtaining higher turbine inlet temperature. However, the problem of conventional TBC system is the failure of yittria-stabilized zirconia (YSZ) top coat due to formation of thermally grown oxide (TGO) layer between the bond coat and YSZ top coat. The TGO formation should be properly controlled in order to prevent the spallation of the top coat. In the current review paper, an attempt has been made to focus oxidation and hot corrosion behavior of conventional thermal barrier coatings applied on gas turbine components for increasing the efficiency of gas turbines.
ISSN:2731-8397
0030-770X
2731-8400
1573-4889
DOI:10.1007/s11085-023-10160-8