Microstructure-based Life Prediction of Thermal Barrier Coatings
2014 (English)Conference paper (Refereed)
The widespread use of thermal barrier coatings (TBC) in gas turbines stresses the importance of accurate life prediction models for TBCs. During service, the TBC may fail due to thermal fatigue or through the formation of thermally grown oxides (TGOs). The current paper presents a Thermo-Calc/Dictra-based approach to life prediction of isothermally oxidised atmospheric plasma sprayed (APS) TBCs. The β-phase depletion of the coating was predicted and compared to life prediction criteria based on TGO thickness and Al content in the coating. All tried life models underestimated the life of the coating where the β-depletion-based model was the most conservative.
Place, publisher, year, edition, pages
Trans Tech Publications Inc., 2014. Vol. 592-593, 413-416 p.
Thermal barrier coating, TBC, life prediction, isothermal oxidation, interdiffusion
Engineering and Technology Materials Engineering
IdentifiersURN: urn:nbn:se:liu:diva-95554DOI: 10.4028/www.scientific.net/KEM.592-593.413ISI: 000336694400091OAI: oai:DiVA.org:liu-95554DiVA: diva2:635988
THERMEC,2-6 December, 2013, Las Vegas, USA