Metal composite as backing for ultrasonic transducers dedicated to non-destructive measurements in hostile

Boubenia, Redha; Rosenkrantz, Eric; Despetis, Florence; Ferrandis, Jean‐Yves

doi:10.1088/1757-899x/108/1/012007

Cited by 3 publications

(4 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The value of the acoustic attenuation coefficient was slightly lower than our objective target of 1 dB/mm/MHz, but our simulations did not take due account of the intrinsic attenuation of the different phases (bronze, tin, epoxy resin). Nonetheless, this value is comparable to attenuation values found in the literature for a multiphasic metallic medium [23][24][25]37].…”

Section: Theoretical Acoustic Properties In the Developed Multiphase ...supporting

confidence: 88%

“…Most acoustic characterizations of multiphasic materials are performed at a maximum frequency of 10 MHz [ 23 , 25 , 37 ]. Only a few experimental set-ups have involved high-frequency characterizations [ 38 ].…”

Section: Resultsmentioning

confidence: 99%

“…However, metallic substrates are also known for low attenuation [ 22 ]. Thus, the fabrication of composite materials for which the matrix and the reinforcements are metals [ 23 , 24 , 25 , 26 ] seems well set to offer a suitable backing alternative with increased attenuation while maintaining high acoustic impedance. Moreover, most characterizations of such materials have been conducted at a maximum working frequency of 10 MHz, and specific experimental set-ups and methods for >20 MHz measurements need developing.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

High Acoustic Impedance and Attenuation Backing for High-Frequency Focused P(VDF-TrFE)-Based Transducers

Siewe

Callé

Meulen

et al. 2023

Sensors

View full text Add to dashboard Cite

Backing materials with tailored acoustic properties are beneficial for miniaturized ultrasonic transducer design. Whereas piezoelectric P(VDF-TrFE) films are common elements in high-frequency (>20 MHz) transducer design, their low coupling coefficient limits their sensitivity. Defining a suitable sensitivity–bandwidth trade-off for miniaturized high-frequency applications requires backings with impedances of >25 MRayl and strongly attenuating to account for miniaturized requirements. The motivation of this work is related to several medical applications such as small animal, skin or eye imaging. Simulations showed that increasing the acoustic impedance of the backing from 4.5 to 25 MRayl increases transducer sensitivity by 5 dB but decreases the bandwidth, which nevertheless remains high enough for the targeted applications. In this paper, porous sintered bronze material with spherically shaped grains, size-adapted for 25–30 MHz frequency, was impregnated with tin or epoxy resin to create multiphasic metallic backings. Microstructural characterizations of these new multiphasic composites showed that impregnation was incomplete and that a third air phase was present. The selected composites, sintered bronze–tin–air and sintered bronze–epoxy–air, at 5–35 MHz characterization, produced attenuation coefficients of 1.2 and >4 dB/mm/MHz and impedances of 32.4 and 26.4 MRayl, respectively. High-impedance composites were adopted as backing (thickness = 2 mm) to fabricate focused single-element P(VDF-TrFE)-based transducers (focal distance = 14 mm). The center frequency was 27 MHz, while the bandwidth at −6 dB was 65% for the sintered-bronze–tin–air-based transducer. We evaluated imaging performance using a pulse-echo system on a tungsten wire (diameter = 25 μm) phantom. Images confirmed the viability of integrating these backings in miniaturized transducers for imaging applications.

show abstract

Section: Theoretical Acoustic Properties In the Developed Multiphase ...supporting

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

High Acoustic Impedance and Attenuation Backing for High-Frequency Focused P(VDF-TrFE)-Based Transducers

Siewe

Callé

Meulen

et al. 2023

Sensors

View full text Add to dashboard Cite

show abstract

“…Piezoelectric-based ultrasonic transducer is typically constructed of three main elements, i.e. piezoelectric ceramic as the active element, the backing layer and the matching layer [1]. The active element is ringing at which a frequency upon the excitation of an electrical signal [2].…”

Section: Introductionmentioning

confidence: 99%

Metal-Polymer Composite as an Acoustic Attenuating Material for Ultrasonic Transducers

Hidayat

Syafei

Wibawa

et al. 2020

KEM

View full text Add to dashboard Cite

This work reports the acoustic evaluation of a tungsten-epoxy composite which is functioned as a backing material of an ultrasonic transducer. The composite is prepared by mixing tungsten powder in epoxy at a weight ratio of 4:1 using a shaker milling and curing the mixture under a vacuum condition. The sound velocity and acoustic attenuation in the prepared composite is measured by propagating a 200-kHz ultrasonic wave with a through transmission mode. The prepared composite is subsequently assembled with a 1-MHz piezoelectric disk (PZT-8) and an epoxy layer as the active element and the matching layer, respectively, into a fabricated ultrasonic transducer. A square-wave burst pulse is used as an excitation signal for the evaluation of the fabricated transducer. The generated ultrasonic wave shows a higher damping in the presence the backing layer. In addition, the measured sound velocity and acoustic attenuation of prepared composite showed that the ratio of 4:1 is sufficient composition in order to apply as a backing material. In conclusion, control the transducer characteristics is determined by the acoustic properties of tungsten-epoxy composite.

show abstract

Controllable acoustic properties of tungsten-epoxy composites prepared using a shaker-type ball milling process

Hidayat,

Syafei,

Setianto

et al. 2024

Results in Materials

View full text Add to dashboard Cite

Metal composite as backing for ultrasonic transducers dedicated to non-destructive measurements in hostile

Cited by 3 publications

References 4 publications

High Acoustic Impedance and Attenuation Backing for High-Frequency Focused P(VDF-TrFE)-Based Transducers

High Acoustic Impedance and Attenuation Backing for High-Frequency Focused P(VDF-TrFE)-Based Transducers

Metal-Polymer Composite as an Acoustic Attenuating Material for Ultrasonic Transducers

Controllable acoustic properties of tungsten-epoxy composites prepared using a shaker-type ball milling process

Contact Info

Product

Resources

About