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Coating thickness and elastic modulus measurement using ultrasonic bulk wave resonance

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Dixon, S., Lanyon, B. and Rowlands, G. (George). (2006) Coating thickness and elastic modulus measurement using ultrasonic bulk wave resonance. Applied Physics Letters, Vol.88 (No.14). p. 141907. ISSN 0003-6951

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Official URL: http://dx.doi.org/10.1063/1.2192144

Abstract

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.

Item Type:	Journal Article
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering Q Science > QC Physics
Divisions:	Faculty of Science > Engineering Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	Ultrasonics, Moduli theory, Transducers, Coatings, Thickness measurement
Journal or Publication Title:	Applied Physics Letters
Publisher:	American Institute of Physics
ISSN:	0003-6951
Official Date:	4 April 2006
Volume:	Vol.88
Number:	No.14
Page Range:	p. 141907
Identification Number:	10.1063/1.2192144
Status:	Peer Reviewed
Access rights to Published version:	Open Access
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URI:	http://wrap.warwick.ac.uk/id/eprint/979