Comparison between Microwave Infrared Thermography and CO2 Laser Infrared Thermography in Defect Detection in Applications with CFRP
| Autor: | Franck Brachelet, Didier Defer, Florin Breaban, Sam-Ang Keo |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Materials science
Infrared business.industry Indium antimonide 020208 electrical & electronic engineering Delamination 02 engineering and technology 021001 nanoscience & nanotechnology Laser law.invention chemistry.chemical_compound Horn antenna Optics chemistry law Cavity magnetron Thermography 0202 electrical engineering electronic engineering information engineering Optoelectronics 0210 nano-technology business Microwave |
| Zdroj: | Materials Sciences and Applications. :600-605 |
| ISSN: | 2153-1188 2153-117X |
| Popis: | This paper presents two infrared thermography methods with CO2 Laser excitation and microwave excitation applied to defect detection in CFRP. The tests were conducted with two specimens, one with defect, and another one without defect. On two concrete plates 40 cm× 40 cm× 4.5 cmwere reinforced by CFRP; the defects were made by the absence of adhesive on an area10 cm× 10 cm. The specimens were heated by microwave, generated by a commercial magnetron of 2.45 GHz and guided by a pyramidal horn antenna, with a power of 360 W within 150 s. Another series of the tests was conducted with CO2 Laser, wavelength 10.6 μm, by heating the samples with a power of 300 W within 40 s. An infrared camera sensitive to medium waves in range of 3 - 5 μm, with a detector of 320 × 256 matrix detector in InSb (Indium Antimonide), was used to record the thermograms. As a result, the CO2 Laser excitation is better for the delamination detection in CFRP. This study opens interesting perspectives for inspecting other types of defects in materials sciences; the microwave excitation is suitable for the deep defects in the materials whereas the CO2 Laser excitation is better for the defects near the surface of the materials. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|