Apparatus and method for measuring the thickness of a coating

Autor:	John A. Johnson, Nancy M. Carlson, David M. Tow, John B Walter
Rok vydání:	2002
Předmět:	Materials science Acoustics and Ultrasonics business.industry Attenuation Acoustic interferometer Phase (waves) engineering.material Wavelength Optics Arts and Humanities (miscellaneous) Coating Surface wave engineering Phase velocity business Electromagnetic acoustic transducer
Zdroj:	The Journal of the Acoustical Society of America. 112:1733
ISSN:	0001-4966
DOI:	10.1121/1.1526526
Popis:	An apparatus and method for measuring the thickness of a coating adhered to a substrate. An electromagnetic acoustic transducer is used to induce surface waves into the coating. The surface waves have a selected frequency and a fixed wavelength. Interpolation is used to determine the frequency of surface waves that propagate through the coating with the least attenuation. The phase velocity of the surface waves having this frequency is then calculated. The phase velocity is compared to known phase velocity/thickness tables to determine the thickness of the coating.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1add6058b21dd2be4085d0d6858d156c https://doi.org/10.1121/1.1526526 Zobrazit plný text záznamu