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http://dx.doi.org/10.12654/JCS.2015.31.3.07

A Study on Selection of Ultrasonic Transducer and Contact Material for Surface Irregularities of Stone Cultural Heritage  

Jo, Young Hoon (Department of Cultural Heritage Conservation Sciences, Kongju National University)
Lee, Chan Hee (Department of Cultural Heritage Conservation Sciences, Kongju National University)
Publication Information
Journal of Conservation Science / v.31, no.3, 2015 , pp. 267-278 More about this Journal
Abstract
In this study, the elastomer cover, a new contact material, was developed to establish the customized ultrasonic measurement considering surface irregularities of stone cultural heritages. The cover exhibits high elastic force and wear resistance because it has tensile strength of 17MPa and elongation of 625%. In addition, as a result of comparative experiments for the seven types according to transducers and contact materials including the elastomer cover, rock surface irregularities significantly affect attenuation of ultrasonic velocity. The phenomenon was more noticeable in the chiseling finish and indirect transmission measurement rather than the dabbed finish and direct transmission measurement. However, the Type F using the exponential transducer and elastomer cover showed stable P-wave velocity and high amplitude regardless of the surface irregularities. This because the elastomer cover sufficiently sticks to surface irregularities and removes pores between a transducer and a rock specimen. Therefore, the Type F should be used for the ultrasonic measurement of stone cultural heritages with surface irregularities.
Keywords
Stone cultural heritage; Surface irregularities; Ultrasonic transducer; Contact material; Elastomer cover;
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Times Cited By KSCI : 5  (Citation Analysis)
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