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Tool for detecting high-temperature acoustic emission signal of thermal barrier coating

A technology of acoustic emission signal and thermal barrier coating, which is applied in the direction of material analysis using acoustic emission technology, can solve problems such as inability to work under high temperature conditions, avoid contact with high temperature environments, ensure no distortion, and reduce signal attenuation Effect

Active Publication Date: 2015-09-16
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to overcome the defect that the existing devices for detecting acoustic emission signals of thermal barrier coatings cannot work under high temperature conditions. The present invention provides a tool for detecting high temperature acoustic emission signals of thermal barrier coatings

Method used

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  • Tool for detecting high-temperature acoustic emission signal of thermal barrier coating
  • Tool for detecting high-temperature acoustic emission signal of thermal barrier coating
  • Tool for detecting high-temperature acoustic emission signal of thermal barrier coating

Examples

Experimental program
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Embodiment 1

[0067] Prepare various accessories and parts required for the tooling according to the above plan, and make a backup copy if necessary. It mainly includes the processed sleeve (it needs to be confirmed against the drawing and the actual object before assembly), the initial length l 0 shorter and stiffer K Slightly larger spring, PTFE hose for compressed air, three M4 screws of appropriate length (after fixing the substrate, the end face of the screw should be close to the outer end face of the sleeve), high temperature solid lubricating sound transmission glue, high temperature Tape, pencil, lead, etc.

[0068] The assembly sequence is different, and must be assembled according to the correct operation sequence, including:

[0069] Connect the PTFE hose through the compressed air to the internal thread of the hollow sleeve M12;

[0070] Then put the short spring into the bottom end of the hollow sleeve, close to the bottom end of the M12 internal thread;

[0071] Then ali...

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Abstract

The invention provides a tool for detecting a high-temperature acoustic emission signal of a thermal barrier coating. The tool comprises a fixing unit, a sensor, a thermal insulation unit and a cooling unit, wherein the fixing unit is used for fixing a to-be-detected sample the surface of which is sprayed with a thermal barrier coating; the sensor is used for detecting the acoustic emission signal of the to-be-detected sample; the thermal insulation unit is connected between the to-be-detected sample and the sensor; the cooling unit is used for cooling the sensor. According to the invention, the problem that the acoustic emission sensor is limited in use temperature, and the acoustic emission signal of the thermal barrier coating at high-temperature condition cannot be detected is solved.

Description

technical field [0001] The invention relates to a tool for detecting high-temperature acoustic emission signals of thermal barrier coatings. Background technique [0002] The non-destructive testing of thermal barrier coatings (TBC) has always been an important topic in the research of thermal barrier coatings. The failure process of thermal barrier coatings is usually caused by the initiation, propagation and propagation of cracks. Through the real-time dynamic monitoring of the failure process of thermal barrier coatings, the failure mechanism of thermal barrier coatings can be understood more deeply, and the service life of thermal barrier coatings can be evaluated and predicted. Acoustic emission technology can dynamically capture the signal of crack initiation and expansion during the failure process of the thermal barrier coating. By analyzing the spectral characteristics of the acoustic emission signal, the location of the crack source in time and space can be realize...

Claims

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Application Information

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IPC IPC(8): G01N29/14
Inventor 王亮邵芳刘晨光钟兴华赵华玉陶顺衍
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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