Journal Article

FZJ-2014-00888

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Damage Characterization of Thermal Barrier Coatings by Acoustic Emission and Thermography

Nies, D. (Corresponding author) ; Rehmer, B. ; Skrotzki, B. ; Vaßen, R.FZJ*

2012
Wiley-VCH Verl. Weinheim

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Please use a persistent id in citations: doi:10.1002/adem.201200107

Abstract: Thermal barrier coatings allow increasing the operating temperature and efficiency of land-, sea-, or air-based turbines. As failure of the coating may result in serious damage of the turbine, reliable estimation of its lifetime is essential. To assess the lifetime, cyclic tests are conceived to combine thermal loading by heating the surface of the coating with laser irradiation and nondestructive methods for damage determination. Using laser irradiation allows a high reproducibility of the thermal load. The temperature of the sample surface during thermal loading is determined by an infrared-camera which also enables the possibility to detect damage in the coating via thermography. Additionally, four acoustic sensors, attached to the experimental setup, are used to detect damage in the sample and determine the source of acoustic events. Results of acoustic emission correlate well with thermographic images that visualize the formation and evolution of damage through delaminations in the samples.

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Contributing Institute(s):

1. Werkstoffsynthese und Herstellungsverfahren (IEK-1)

Research Program(s):

1. 122 - Power Plants (POF2-122) (POF2-122)

Appears in the scientific report 2013

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Database coverage:
; Current Contents - Life Sciences ; JCR ; SCOPUS ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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