An Indentation Based Non-Destructive Evaluation Technique for Thermal Barrier Coating Spallation Prediction

2011 ◽  
pp. 135-150
Author(s):  
J. M. Tannenbaum ◽  
K. Lee ◽  
B. S.-J. Kang ◽  
M. A. Alvin
Keyword(s):  
Thermal Barrier Coating ◽  
Thermal Barrier ◽  
Evaluation Technique ◽  
Non Destructive Evaluation ◽  
Barrier Coating ◽  
Non Destructive

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

2019 ◽  
Vol 23 (3 Part A) ◽  
pp. 1313-1321
Author(s):  
Qingju Tang ◽  
Shuaishuai Gao ◽  
Yongjie Liu ◽  
Yumei Lu ◽  
Peng Xu
Keyword(s):  
Thermal Barrier Coating ◽  
Thermal Barrier ◽  
Non Destructive Testing ◽  
Coating Structure ◽  
Destructive Testing ◽  
Pulsed Excitation ◽  
Barrier Coating ◽  
Testing Technology ◽  
Non Destructive ◽  
Detection Effect

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 Yttria-stabilized zirconia 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 Yttria-stabilized zirconia thermal barrier coating structure debonding defects using long-pulsed excitation of infrared wave non-destructive testing technology

Calibration of Laser Piezospectroscopy Using Alumina/Chromia Solid Solutions Obtained by Coprecipitation

2001 ◽  
Author(s):  
Swetha Sridharan ◽  
E. H. Jordan ◽  
Maurice Gell
Keyword(s):  
Thermal Barrier Coating ◽  
Solid Solutions ◽  
Thermal Barrier ◽  
Apparent Stress ◽  
Thermal Cycles ◽  
Barrier Coating ◽  
Non Destructive ◽  
Tbc Systems ◽  
Hydrostatic Component

Abstract Cr3+ photoluminescence peizo-spectroscopy (CPLPS) is a technique that allows the measurement of the hydrostatic component of stress in α alumina oxides. This method is being developed in our laboratory as a non-destructive inspection technique for thermal barrier coating systems. It has been shown that the Cr3+ concentration influences the magnitude of the shifts in the fluorescence frequencies, Δv of the R1 and the R2 peaks [1,2] and hence the apparent stress. Therefore, this work is an attempt to quantify the extent of this shift, consequent to the Cr3+ concentration in the TBC systems and to study the variation of this effect with thermal cycles on the TBCs. In addition, we have developed a method of estimating Cr3+ content based on the intensity of satellite peaks referred to as n-lines. The experiments are also designed to validate the n-line based method of estimating Cr3+ content and its affect on the apparent stress value.

Non-destructive thermographic monitoring of crack evolution of thermal barrier coating coupons during cyclic oxidation aging

2011 ◽  
Vol 59 (16) ◽  
pp. 6351-6361 ◽  
Author(s):  
F. Cernuschi ◽  
S. Capelli ◽  
P. Bison ◽  
S. Marinetti ◽  
L. Lorenzoni ◽  
...  
Keyword(s):  
Thermal Barrier Coating ◽  
Cyclic Oxidation ◽  
Thermal Barrier ◽  
Crack Evolution ◽  
Barrier Coating ◽  
Non Destructive
Sign in / Sign up

Export Citation Format

Share Document