Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 33, Issue 2, Pages 269-276Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2012.07.037
Keywords
Sol-gel; Oxidation; Reinforcement; Thermal barrier coating
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Cyclic oxidation life enhancement of sol gel thermal barrier coatings is obtained via the reinforcement of the controlled micro-crack network that forms during the initial sintering of the deposit. Two different sol-gel methods are used to fill in the process-induced cracks, namely dipcoating and spray-coating. Filling parameters, for instance the number of passes or the viscosity of the sol are adjusted, using various techniques such as profilometry and microstructural analysis, to optimise crack filling. Cyclic oxidation tests are implemented at both 1100 degrees C and 1150 degrees C to investigate the efficiency of the various reinforcement procedures developed and address the influence of the specific microstructure on the oxidation behaviour. (C) 2012 Elsevier Ltd. All rights reserved.
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