Plasma-sprayed thermal barrier coatings: numerical study on damage localization and evolution
Journal Title: Frattura ed Integrità Strutturale - Year 2016, Vol 10, Issue 35
Abstract
Thermal barrier coatings (TBCs) are advanced material systems used to enhance performance and in-service life of components operated at high temperatures in gas turbines and other power-generation devices. Because of complexity, numerical methods became important tools both for design of these coatings and for in-service life estimations and optimization. In this contribution, two main features that affect the TBCs’ performance, namely the roughness of the bond coat and the microstructure of the ceramic top coat, are discussed based on Finite Element Method (FEM) and Finite Element Microstructure MEshfree (FEMME) simulations that were used to calculate stresses and assess damage within the coating. Roughness data obtained from plasma-sprayed CoNiCrAlY + YSZ coated samples are supplemented to discuss assumptions and results of employed numerical models.
Authors and Affiliations
K. Slámečka, P. Skalka, L. Čelko, J. Pokluda, T. Marrow, U. Thandavamoorthy
Keywords
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- EP ID EP164352
- DOI 10.3221/IGF-ESIS.35.37
- Views 79
- Downloads 0
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