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Title: Application of Laser-Ultrasonics to the Non-Contact, Pulse Echo Measurement of the Thickness of Micron Thin Metallic Coatings

Abstract

The general scope of this work was to use recently available ultra-short pulsed lasers to perform laser-ultrasonic pulse-echo thicknesses measurements on thin electroplated metallic coatings. Experiments were first performed using a femtosecond laser coupled to a confocal Fabry-Perot interferometer (CFPI). The results showed that the CFPI is often inappropriate for the detection of ultrasound pulses having spectral widths much larger than the interferometer's free spectral range. A second experimental session was conducted using a picosecond laser and an InPFe photorefractive interferometer. Multiple echoes of broad band compression waves (up to 500 MHz) were successfully detected on electrodeposited metallic coatings of zinc on steel substrates for thicknesses from 30 to 100 microns. The results show very little dispersion and attenuation in the zinc coatings.

Authors:
; ;  [1];  [2]; ;  [3]
  1. Tecnar Automation Ltd, Saint-Bruno, QC J3V6B5 (Canada)
  2. Institut National de Recherche Scientifique, Varennes, QC J3X1S2 (Canada)
  3. Industrial Matreials Institute, NRC, Boucherville, QC J4B6Y4 (Canada)
Publication Date:
OSTI Identifier:
21054962
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 894; Journal Issue: 1; Conference: Conference on review of progress in quantitative nondestructive evaluation, Portland, OR (United States), 30 Jul - 4 Aug 2006; Other Information: DOI: 10.1063/1.2717977; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ATTENUATION; COATINGS; COMPRESSION; DETECTION; ELECTRODEPOSITION; FABRY-PEROT INTERFEROMETER; INTERFEROMETRY; LASER RADIATION; MHZ RANGE; PULSES; STEELS; SUBSTRATES; THICKNESS; THIN FILMS; ULTRASONIC TESTING; ULTRASONIC WAVES; ZINC

Citation Formats

Nadeau, A., Nadeau, F., Choquet, M., Martin, F., Blouin, A., and Lord, M. Application of Laser-Ultrasonics to the Non-Contact, Pulse Echo Measurement of the Thickness of Micron Thin Metallic Coatings. United States: N. p., 2007. Web. doi:10.1063/1.2717977.
Nadeau, A., Nadeau, F., Choquet, M., Martin, F., Blouin, A., & Lord, M. Application of Laser-Ultrasonics to the Non-Contact, Pulse Echo Measurement of the Thickness of Micron Thin Metallic Coatings. United States. doi:10.1063/1.2717977.
Nadeau, A., Nadeau, F., Choquet, M., Martin, F., Blouin, A., and Lord, M. Wed . "Application of Laser-Ultrasonics to the Non-Contact, Pulse Echo Measurement of the Thickness of Micron Thin Metallic Coatings". United States. doi:10.1063/1.2717977.
@article{osti_21054962,
title = {Application of Laser-Ultrasonics to the Non-Contact, Pulse Echo Measurement of the Thickness of Micron Thin Metallic Coatings},
author = {Nadeau, A. and Nadeau, F. and Choquet, M. and Martin, F. and Blouin, A. and Lord, M.},
abstractNote = {The general scope of this work was to use recently available ultra-short pulsed lasers to perform laser-ultrasonic pulse-echo thicknesses measurements on thin electroplated metallic coatings. Experiments were first performed using a femtosecond laser coupled to a confocal Fabry-Perot interferometer (CFPI). The results showed that the CFPI is often inappropriate for the detection of ultrasound pulses having spectral widths much larger than the interferometer's free spectral range. A second experimental session was conducted using a picosecond laser and an InPFe photorefractive interferometer. Multiple echoes of broad band compression waves (up to 500 MHz) were successfully detected on electrodeposited metallic coatings of zinc on steel substrates for thicknesses from 30 to 100 microns. The results show very little dispersion and attenuation in the zinc coatings.},
doi = {10.1063/1.2717977},
journal = {AIP Conference Proceedings},
number = 1,
volume = 894,
place = {United States},
year = {Wed Mar 21 00:00:00 EDT 2007},
month = {Wed Mar 21 00:00:00 EDT 2007}
}