International Scientific Journal

Thermal Science - Online First

online first only

Experimental research on YSZ TBC structure debonding defect detection using long-pulsed excitation of infrared thermal wave non-destructive testing

TBC (Thermal barrier coating) structure components are prone to coating cracking, debonding and peeling defects in the service process, which affects the work safety and reliability of the hot end parts, even result to catastrophic consequences. Experimental research on YSZ thermal barrier coating structure debonding defect detection has been conducted using long-pulsed excitation of infrared wave non-destructive testing technology. Differences between surface temperature signals of sound and defective regions, detection effect comparison of heating and cooling process, detection effect comparison of different defect preparation methods, and impact of inspection parameters on detection effect were studied and discussed. The research conclusions will provide technical guidance to YSZ TBC structure debonding defects using long-pulsed excitation of infrared wave non-destructive testing technology.
PAPER REVISED: 2018-06-17
PAPER ACCEPTED: 2018-08-12
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