Ultrasonic characterization, simulation of porous metal in the interest of high frequency applications
Résumé
Today, research is set up to carry out studies on the ultrasonic characterization of porous metals in the interest of ultrasonic applications. In this work, the acoustic properties of several porous metals were investigated to be used as a backing material in ultrasonic transducers. Results in terms of celerity, acoustic impedance and attenuation are reported for porosity ranging from 25 % to 50 % with pore size ranging from 1.7 μm to 60 μm. The acoustic impedance of the porous material depends linearly on the
porosity and can be described by a simple model of the homogenization of a fluid in a solid matrix. Results show that the acoustic attenuation strongly depends on the porosity and can reach 4.3 dB.mm-1 at 1 MHz which is suitable to be used as a backing material.
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SINCE2022 - Full paper - Porous metal characterization - version soumise 10-19-2022.pdf (952.43 Ko)
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