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IR thermography applied to flash experiments of semitransparent TBCs

pubblicazioni - Memoria

IR thermography applied to flash experiments of semitransparent TBCs

Sviluppo di un nuovo algoritmo per il trattamento dati di misure della diffusività termica di barriere termiche di YPSZ che tiene conto della semitrasparenza della YPSZ alla radiazione del laser NdYAG.

Thermal Barrier Coatings (TBC) are applied to protect components of gas turbines from high temperature of combustion gases. ZrO2, the material mainly used in TBCs, is semitransparent to near IR radiation that is typically delivered by the laser in the laser flash equipment and also radiated at working temperatures that are greater than 1000 °C. Thermography and radiometers are utilized to measure thermal diffusivity of TBCs. Discussion is done on the countermeasures to obtain correct results in case of semitransparency.

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