Metal-Polymer Composite as an Acoustic Attenuating Material for Ultrasonic Transducers
| Autor: | Risdiana, Mohammad Taufik, Bambang Mukti Wibawa, Ayi Bahtiar, Darmawan Hidayat, Nendi Suhendi Syafei |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Mechanical Engineering 010401 analytical chemistry Composite number 01 natural sciences 0104 chemical sciences Metal Mechanics of Materials visual_art 0103 physical sciences visual_art.visual_art_medium Polymer composites General Materials Science Ultrasonic sensor Composite material 010301 acoustics |
| Zdroj: | Key Engineering Materials. 860:303-309 |
| ISSN: | 1662-9795 |
| DOI: | 10.4028/www.scientific.net/kem.860.303 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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