Monitoring damage evolution in thermal barrier coatings with thermal wave imaging

Franke, B.; Sohn, Yong Ho; Chen, X.; Mutasim, Z.

doi:10.1016/j.surfcoat.2005.07.090

Cited by 22 publications

(4 citation statements)

References 12 publications

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“…In order to obtain a thermal image with a high SNR, a new post-processing method of the thermal image is used to obtain clear defect information. This image processing is generally divided into single frame image processing and continuous multi-frame image processing [107][108][109][110][111][112][113][114][115][116][117][118].…”

Section: Thermal Wave Image-processing Methodsmentioning

confidence: 99%

Development and Application of Infrared Thermography Non-Destructive Testing Techniques

Jiang

Zhang

2020

Sensors

105

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: Effective testing of defects in various materials is an important guarantee to ensure its safety performance. Compared with traditional non-destructive testing (NDT) methods, infrared thermography is a new NDT technique which has developed rapidly in recent years. Its core technologies include thermal excitation and infrared image processing. In this paper, several main infrared thermography nondestructive testing techniques are reviewed. Through the analysis and comparison of the detection principle, technical characteristics and data processing methods of these testing methods, the development of the infrared thermography nondestructive testing technique is presented. Moreover, the application and development trend are summarized.

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Section: Thermal Wave Image-processing Methodsmentioning

confidence: 99%

Development and Application of Infrared Thermography Non-Destructive Testing Techniques

Jiang

Zhang

2020

Sensors

105

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“…Several non-destructive evaluation (NDE) techniques for the assessment of TBCs have been developed, mainly including infrared thermograph, acoustic emission, ultrasonic, impedance spectroscopy, microwave and eddy current testing. An infrared thermograph is widely used to assess TBCs [ 2 , 3 , 4 , 5 , 6 ], which can be employed to test not only the thickness of the ceramic top coating but also the porosity content and thermal conductivity of the TBCs. Palumbo and Tamborrino [ 7 ] used an empirical thermographic method to evaluate the thickness of the thermal coating and to discriminate between an unevenness of the thickness and a defect zone.…”

Section: Introductionmentioning

confidence: 99%

An Electromagnetic/Capacitive Composite Sensor for Testing of Thermal Barrier Coatings

Ren

Pan

Chen

2018

Sensors

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Thermal barrier coatings (TBCs) can significantly reduce the operating temperature of the aeroengine turbine blade substrate, and their testing technology is very urgently demanded. Due to their complex multi-layer structure, it is hard to evaluate TBCs with a single function sensor. In this paper, an electromagnetic/capacitive composite sensor is proposed for the testing of thermal barrier coatings. The dielectric material is tested with planar capacitor, and the metallic material is tested with electromagnetic coils. Then, the comprehensive test and evaluation of thermal barrier coating system can be realized. The sensor is optimized by means of theoretical and simulation analysis, and the interaction between the planar capacitor and the electromagnetic coil is studied. The experimental system is built based on an impedance analyser and multiplex unit to evaluate the performance of the composite sensor. The transimpedances and capacitances are measured under different coating parameters, such as thickness and permittivity of top coating as well as bond layer conductivity. The experimental results agree with the simulation analysis, and the feasibility of the sensor is proved.

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“…Isothermal [6] and cyclic oxidation [7] tests, thermogravimetry analysis [8] and acoustic emission [9] are the most employed techniques. More evolved techniques are also used such as the infrared characterization [10] (thermal wave imaging) and photo-luminescence piezo-spectroscopy (PLPS) [11].…”

Section: Introductionmentioning

confidence: 99%

<i>In Situ </i>Thermal Gradient Controlled Investigation of Spallation -Experimental Design and Preliminary Results

Sniezewski

Maoult

Lours

2008

MSF

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Based on a coupled numerical and experimental approach, the design and implementation of an in situ thermal-gradient-controlled cyclic oxidation test, dedicated to the investigation of the TGO and TBC spallation, is presented. The influence of the specimen through thickness thermal gradient as well as the benefits of the video real-time monitoring of the cooling phase of an oxidation test is discussed in the case of the spallation of an alumina scale grown on FeCrAl alloys.

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Monitoring damage evolution in thermal barrier coatings with thermal wave imaging

Cited by 22 publications

References 12 publications

Development and Application of Infrared Thermography Non-Destructive Testing Techniques

Development and Application of Infrared Thermography Non-Destructive Testing Techniques

An Electromagnetic/Capacitive Composite Sensor for Testing of Thermal Barrier Coatings

<i>In Situ </i>Thermal Gradient Controlled Investigation of Spallation -Experimental Design and Preliminary Results

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