Community Research and Development Information Service - CORDIS


The velocity of leaky Rayleigh waves, generated by a special transducer immersed in water, was calculated from the measurement of the phase phi as a function of the transducer distance z to the specimen surface in the appropriate z-range. A model predicting the theoretical phi(z)-curve, allowed the choice of this z-range. An approximate analytical formula is derived from a Laurent expansion of the reflection coefficient around the Rayleigh pole, exhibiting the effect of the main parameters (characteristics of the beam and of the material). The technique was then applied to metallic coatings deposited on steel substrates in order to measure their thickness.

Additional information

Authors: COSTE J F, JRC Ispra (IT);LAKESTANI F, JRC Ispra (IT)
Bibliographic Reference: EUR 16308 EN (1995) 41 pp., FS, free of charge
Availability: Available from Joint Research Centre, Publication Department, I-21020 Ispra (Va.) (IT)
Record Number: 199511413 / Last updated on: 1995-10-31
Original language: en
Available languages: en