Edwards, R. S. (Rachel S.), Perry, R. (Robert), Backhouse, D. J., Moore, I. J., Cleanthous, D. (Demetra), Clough, A. R. and Stone, D. (2011) Non-contact ultrasonic measurements of the elastic constants of magnetic materials. Journal of Physics: Conference Series, Vol. 286 . 012050. doi:10.1088/1742-6596/286/1/012050 ISSN 1742-6596.

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Abstract

Ultrasonic testing using contacting transducers such as quartz or PZT is well established. However, standard measurement techniques used require physical contact of the sample and ultrasonic transducer and some sort of couplant between the two. With this configuration there is a possibility of damaging the sample, transducer or bond during testing, thermal cycling, or removal of the transducer. We present results taken using recent advances in non-contact methods of ultrasound generation and detection using electromagnetic acoustic transducers (EMATs), which offer some significant benefits over contact ultrasonic techniques. Circumventing the need for couplant removes the possibility of contaminating the system, which is an issue for some material property measurements, and allows easier measurements over a wider range of temperatures. An automated data analysis system has been developed which allows the velocity of sound in the sample, and hence the elastic constants, to be determined to a high accuracy. This technique is illustrated using measurements of the alloy Gd(64)Sc(36).

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
Journal or Publication Title:	Journal of Physics: Conference Series
Publisher:	Institute of Physics Publishing Ltd.
ISSN:	1742-6596
Official Date:	2011
Dates:	Date Event 2011 Published
Volume:	Vol. 286
Page Range:	012050
DOI:	10.1088/1742-6596/286/1/012050
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Date of first compliant deposit:	17 December 2015
Date of first compliant Open Access:	17 December 2015
Version or Related Resource:	This is the proceedings version of a paper presented at the Conference on Condensed Matter and Materials Physics (CMMP10), University of Warwick, Coventry, DEC 14-16, 2010

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