Coating thickness and elastic modulus measurement using ultrasonic bulk wave resonance
- Department of Physics, University of Warwick, Coventry CV4 7AL (United Kingdom)
Measurement of the resonant through thickness ultrasonic modes of a homogeneous plate using a fast Fourier transform of the temporal data can be used to calculate plate thickness very accurately. We describe an extension of this principle to two-layer systems, examining a thin coating on a substrate of known properties. The resonant behavior of these systems is predicted and we explain how this approach is used to measure coating thickness and elastic modulus. Noncontact electromagnetic acoustic transducers are used for ultrasonic measurement, as they do not significantly affect the resonant response of the system, unlike alternative contact transducers.
- OSTI ID:
- 20779159
- Journal Information:
- Applied Physics Letters, Vol. 88, Issue 14; Other Information: DOI: 10.1063/1.2192144; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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