Study the possibility of using an elastomeric blend as a plastic interfacial media in ultrasonic transducers

Abstract EN

This work tries to study the using of bromobutyle / butyle elasomeric blends in ultrasonic transducers as a dry plastic interfacial media to inspect porous materials such as concrete and refractory materials which can absorb liquid medias , through the study of acoustic impedance characteristics at interfaces .

These characteristics include acoustic impedance , the percentage of energy reflected, dB loss, Power ratios expressions , and Pressure ratios expressions (Reflection Coefficient & Transmission Coefficient ).

They are studied by using ultrasonic instrument named CSI (type CCT- 4) with 26 KHz frequency .

Also, this research try to specify the suitable bromobutyle / butyle blend for immersion inspect through the matching between the acoustic impedance of the blend and that of water.

Samples preparation achieved in Babylon Tiers Factory.

Results showed that by increasing bromobutyle ratio in the blend both reflection coefficient and the percentage of energy reflected increased while acoustic impedance and Transmission Coefficient have been decreased.

Also, the results show that 20 bromobutyle / 80 butyle is the suitable blend for immersion tests.