Integrated High-Temperature Longitudinal, Shear, and Plate Acoustic-Wave Transducers
| Autor: | Yuu Ono, Ishiang Shih, Kuo Ting Wu, Makiko Kobayashi, Cheng Kuei Jen |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Materials science
nondestructive testing Physics and Astronomy (miscellaneous) Interdigital transducer business.industry High temperature ultrasonic measurement Acoustics Ultrasonic testing interdigital transducer General Engineering Rayleigh wave transducer integrated ultrasonic transducer General Physics and Astronomy Acoustic wave longitudinal wave transducer Piezoelectricity Transducer Lamb wave transducer Nondestructive testing Ultrasonic sensor Center frequency Composite material business shear wave transducer |
| Zdroj: | Japanese Journal of Applied Physics. 46:4688-4692 |
| ISSN: | 1347-4065 0021-4922 |
| DOI: | 10.1143/jjap.46.4688 |
| Popis: | Thick (>40 µm) piezoelectric ceramic films were deposited on metallic substrates by a spray technique to fabricate shear (S) wave probes, longitudinal and shear (L&S) wave probes, and plate acoustic-wave (PAW) transducers for nondestructive testing and characterization (NDT&C) at elevated temperatures. Integrated ultrasonic S-wave probes were fabricated onto a steel substrate with the use of a mode conversion method from L-waves to S-waves. Probes that can simultaneously generate and receive both L- and S-waves were also developed. They operated at up to 350 °C with a center frequency of 5–7 MHz, a 6 dB bandwidth of 4–6 MHz, and a signal-to-noise ratio (SNR) of more than 20 dB. In addition, the fabrication and ultrasonic performance of integrated PAW transducers directly fabricated onto stainless-steel (SS) plates for NDT&C applications have been performed. Theoretical calculations and experimental results indicate PAW propagation in the first antisymmetrical mode along the 0.702-mm-thick SS plate. The PAW signals observed with good SNR demonstrate the NDT&C capability of these integrated PAW transducers in a distance of 5–60 cm operated at 350 °C. |
| Databáze: | OpenAIRE |
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