Estimating thermal properties of coatings by using multi-frequency lock-in thermography

Rocco Zito; Giovanni Ferrarini; Stefano Laureti; Paolo Bison; Marco Ricci

doi:10.1117/12.3014082

7 June 2024 Estimating thermal properties of coatings by using multi-frequency lock-in thermography

Rocco Zito, Giovanni Ferrarini, Stefano Laureti, Paolo Bison, Marco Ricci

Proceedings Volume 13047, Thermosense: Thermal Infrared Applications XLVI; 130470T (2024) https://doi.org/10.1117/12.3014082
Event: SPIE Defense + Commercial Sensing, 2024, National Harbor, Maryland, United States

Abstract

Ceramic thermal barrier coatings (TBCs) play a crucial role in protecting components exposed to combustion gases or high temperature. However, TBCs can degrade over time due to thermal/mechanical fatigue and chemical processes, highlighting the importance of monitoring sintering kinetics. Changes in thermal diffusivity are indicative of sintering progression, necessitating precise and efficient evaluation methods. To this aim, pulsed and lock-in thermography are established techniques, but face limitations such as SNR constraints and the need for multiple tests at single frequencies. To address these challenges, a novel approach called Multi-frequency (MF) lock-in thermography is here introduced. While further research is required for achieving results comparable to state-of-the-art techniques, this study show promises for MF thermography in characterizing TBC properties.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Rocco Zito, Giovanni Ferrarini, Stefano Laureti, Paolo Bison, and Marco Ricci "Estimating thermal properties of coatings by using multi-frequency lock-in thermography", Proc. SPIE 13047, Thermosense: Thermal Infrared Applications XLVI, 130470T (7 June 2024); https://doi.org/10.1117/12.3014082

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