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NDT.net Issue - 2015-12 - Articles
NDT.net Issue: 2015-12
Publication: e-Journal of Nondestructive Testing (NDT) ISSN 1435-4934 (NDT.net Journal)
ARTICLE

Acoustic Properties of the Elastomeric Materials Aqualene and ACE

Edward Ginzel198, Rick MacNeil24, Robert Ginzel222, Mario Zuber3, Anthony N. Sinclar3
1Materials Research Institute101, Waterloo, Canada
2Innovation Polymers6, Kitchener, Ontario, Canada
3Department of Mechanical and Industrial Engineering; University of Toronto41, Toronto, Canada

Abstract: An important aspect of coupling ultrasound into a component is the ability to maximise transmission by matching acoustic impedance. Another consideration in ultrasonic testing is the relative velocities of the coupling and tested materials so as to provide effective angles of refraction. The most widely used materials for coupling in industrial applications are water, poly-methyl-methacrylate (PMMA, trade-names Lucite™, Acrylite™, Perspex™) and cross-linked polystyrene (trade-name Rexolite™). However, under some circumstances, the characteristics of the standard coupling materials may not be suitable and it may be desirable to adjust the acoustic parameters to meet the needs of the application. Work has been carried out to produce polymers that can have their acoustic properties adjusted over a range of velocities similar to that of water. Relevant acoustic properties of the materials have been measured and comparison is made to other polymers commonly encountered in NDT applications.


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