Life Prediction of High-Temperature MCr AIY Coatings Based on Microstructural Observations
2014 (English)In: THERMEC 2013, Trans Tech Publications Inc., 2014, Vol. 922, 143-148 p.Conference paper (Refereed)
Thermal barrier coatings are commonly used in gas turbines for protection against high tem-perature and oxidation. Life prediction of oxidation protective coatingsmay be done bymicrostructure-based techniques such as -depletion based life criteria. In this study, a thermal barrier coating sys-tem, with an overlay NiCoCrAlY coating as bond coat, was oxidised up to 10000 h at 900 C. Themicrostructure was studied and related to Al depletion. It was found that a -depletion based lifecriterion could not be used for the studied coating composition and temperature as it would be tooconservative. A 0-depletion based model was instead suggested and supported by interdiffusion sim-ulation.
Place, publisher, year, edition, pages
Trans Tech Publications Inc., 2014. Vol. 922, 143-148 p.
, Advanced Materials, ISSN 1662-8985
MCrAIY, TBC, thermal barrier coating, life prediction, microstructure, Al depletion
IdentifiersURN: urn:nbn:se:liu:diva-106151DOI: 10.4028/www.scientific.net/AMR.922.143ScopusID: 2-s2.0-84901480665OAI: oai:DiVA.org:liu-106151DiVA: diva2:714399
THERMEC 2013 International Conference on Processing & Manufacturing of Advanced Materials, December 2-6, 2013 Las Vegas, USA