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Laser Shock Adhesion Test (LASAT) of electron beam physical vapor deposited thermal barrier coatings (EB-PVD TBCs)

Abstract : Damage prediction, adhesion strength and remaining lifetime of TBC are highly important data for understanding and preventing TBC spallation on blades. LAser Shock Adhesion Test (LASAT) is a powerful method to measure adhesion of coating due to its rapidity, simplicity and capabilities to distinguish different strength levels and the easy damage observation in case of TBCs. A new protocol of LASAT has been introduced in order to measure the adhesion level of the ceramic coating from the exploitation of the two-dimensional effects that promotes a shock wave pressure-dependent size of the damage. Finite element modeling, taking into account the TBCs dimensions, showed the edges effect on interfacial stress applied by laser shock.
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Last modification on : Friday, December 4, 2020 - 9:44:12 AM
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Grégory Fabre, Vincent Guipont, Michel Jeandin, M. Boustie, J.-P. Cuq-Lelandais, et al.. Laser Shock Adhesion Test (LASAT) of electron beam physical vapor deposited thermal barrier coatings (EB-PVD TBCs). Euro superalloys 2010, May 2010, Wildbach Kreuth, Germany. pp.509-514, ⟨10.4028/www.scientific.net/AMR.278.509⟩. ⟨hal-00624018⟩

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