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Comprehensive Analysis for the Effect of Thermal Barrier Coating Porosity on Ultrasonic Longitudinal Wave Velocity

Communications in Computer and Information Science, ISSN: 1865-0937, Vol: 1303, Page: 349-357
2020
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Conference Paper Description

According to SEM photos of ZrO coatings prepared by plasma spraying, 24 physical models with different porosities were constructed, and ultrasonic testing was simulated by finite-difference time-domain method, and the change of longitudinal wave velocity under porosities was analyzed according to the ultrasonic reflection coefficient amplitude spectroscopy. The simulation shows that the longitudinal wave velocity and porosity of the coating show a linear correlation given that the pore morphology and distribution state are unchanged. The simulation is verified by experiments, and it is found that the experiments and the simulation are in good agreement. This research work has important value for the determination of longitudinal wave velocity of thermal barrier coating in ultrasonic testing.

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