Description of a method for the measurement of the Rayleigh wave velocity: application to the thickness measurement of metallic coatings

Author

Coste, J.F. ; Lakestani, F.

Volume

2

fYear

1994

fDate

Oct. 31 1994-Nov. 3 1994

Firstpage

1233

Abstract

The velocity of leaky Rayleigh waves, generated by a special transducer immersed in water, were calculated from the measurement of the phase φ as a function of the transducer distance z to the specimen surface in the adequate z range. A model, predicting the theoretical φ(z) curve, permitted the choice of this z range. The technique proposed was then applied to metallic coatings deposited on steel substrates in order to measure their thickness. In fact, in layered media, the Rayleigh wave velocity is a function of the product of the layer thickness by the wave frequency

Keywords

Rayleigh waves; metallic thin films; protective coatings; thickness measurement; ultrasonic applications; ultrasonic transducers; ultrasonic velocity measurement; underwater sound; 0.1 mm; Rayleigh wave velocity measurement; layered media; leaky Rayleigh waves; metallic coatings; phase measurement; steel substrates; thickness measurement; transducer; water immersion; Acoustic velocity measurement; Conducting films; Leaky waves; Surface acoustic waves; Thickness measurement; Underwater acoustic transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1994. Proceedings., 1994 IEEE

Conference_Location

Cannes, France

Print_ISBN

0-7803-2012-3

Type

conf

DOI

10.1109/ULTSYM.1994.401808

Filename

401808