Abstract：Infrared thermal NDT methods for debonding engine blade thermal barrier coating structure of crack, back blind holes and other defects is researched and different excitation sources of different defect resolution are studied. For thermal barrier coating debonding, back blind hole defects using nondestructive testing flash excitation comparative study, for thermal barrier coating cracks using flash, nondestructive testing ultrasonic excitation source comparative study. The results show that the two excitation sources are able to complete the thermal barrier coating defects infrared nondestructive testing, detection method continuous flash excitation source for debonding, the ability to distinguish a blind hole defects back stronger, is detected by ultrasound excitation methods for detecting cracks stronger.
2015, Vol. 36 
