Application of flash-pulse thermography methods for quantitative thickness inspection of coatings made by different thermal spraying technologies

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F21%3A43960945" target="_blank" >RIV/49777513:23640/21:43960945 - isvavai.cz</a>
Result on the web
<a href="https://authors.elsevier.com/a/1cFiwwevWD9H7" target="_blank" >https://authors.elsevier.com/a/1cFiwwevWD9H7</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.surfcoat.2020.126748" target="_blank" >10.1016/j.surfcoat.2020.126748</a>

Result language
angličtina
Original language name
Application of flash-pulse thermography methods for quantitative thickness inspection of coatings made by different thermal spraying technologies
Original language description
Flash-pulse thermography is a nondestructive testing method, which is based on thermal excitation and response analysis of a tested sample. It is the traditional method for a non-destructive inspection of discontinuities and inhomogeneities at a sample surface, which is also applicable for a qualitative inspection of coating thickness variations. Possibilities of a quantitative inspection of the coating thickness are investigated numerically and experimentally in this contribution. Pulse-phase and power-function methods are compared and an ambiguity of the pulse-phase evaluation of coating thickness is presented on numerical computation results. Measurement and evaluation procedures are introduced and inspection results are presented for Fe-Cr, Sn-Sb-Cu and WC-CoCr coatings made by TWAS (Twin Wire Arc Spray), flame spraying and HVOF (High Velocity Oxygen Fuel) technologies, respectively. Sensitivity of a response of the power-function method to a change of thickness of the inspected coatings in a connection with their structure is presented. It is demonstrated, that a sensitivity of about 10 μm can be achieved for the analyzed coatings of a thickness in the range 74-1240 μm.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10306 - Optics (including laser optics and quantum optics)

Project
<a href="/en/project/EF18_069%2F0010018" target="_blank" >EF18_069/0010018: LABIR-PAV / Pre-application research of infrared technologies</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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