The glazing of thermal barrier coatings using concentrated solar energy has already been demonstrated, but crack initiation appeared as a major drawback of this processing. In this paper, the thermo-mechanical effects resulting from the fast heating at high temperature were modeled. Crack initiation was found to result from high temperature gradients in the ceramic coating. Experiments performed on plasma-sprayed layer showed that a significant reduction of crack initiation was achieved when the specimen was preheated at temperatures in the range The potential of the solar processing was improved and this technique becomes competitive with conventional laser processes.
Solar Processing for the Glazing of Thermal Barrier Coatings: Reduction of Crack Initiation
Contributed by the Solar Energy Division of the THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF SOLAR ENERGY ENGINEERING. Manuscript received by the ASME Solar Energy Division, December 2000; final revision, February 2002. Associate Editor: A. Steinfeld.
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Ferriere and , A., and Lestrade , L. (August 1, 2002). "Solar Processing for the Glazing of Thermal Barrier Coatings: Reduction of Crack Initiation ." ASME. J. Sol. Energy Eng. August 2002; 124(3): 315–317. https://doi.org/10.1115/1.1488163
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