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Discrimination Between Over-Thickness and Delamination of Thermal Barrier Coatings by Apparent Thermal Effusivity Thermographic Technique

pubblicazioni - Articolo

Discrimination Between Over-Thickness and Delamination of Thermal Barrier Coatings by Apparent Thermal Effusivity Thermographic Technique

L’articolo riguarda una tecnica innovativa non distruttiva, sviluppata da noi in ambito RdS, per valutare lo stato di degrado delle barriere termiche delle palette delle turbine a gas.

When the delamination extent of Thermal Barrier Coatings (TBC) is over a sufficiently large area to assess the adhesion of coatings, Pulse Thermography (PT) is an effective technique, but often the distinction between delamination and TBC over-thickness is very difficult to determine. In this work, a recently developed algorithm based on apparent thermal effusivity has been applied to automatically distinguish between delamination and over-thickness during the inspection of a serviced gas turbine TBC coated vane.

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