Conformable Shear Mode Transducers from Lead‐Free Piezoelectric Ceramic Coatings: An Innovative Ultrasonic Solution for Submerged Structural Health Monitoring

Conformable Shear Mode Transducers from Lead‐Free Piezoelectric Ceramic Coatings: An Innovative Ultrasonic Solution for Submerged Structural Health Monitoring

Advanced Functional Materials

10.1002/adfm.202401544

http://dx.doi.org/10.1002/adfm.202401544

Jie Yin, Voon‐Kean Wong, Qinwen Xu, Percis Teena Christopher Subhodayam, Yasmin Mohamed Yousry, Acharya Shashidhara, Jie Zhou, Ping Luo, Poh Chong Lim, Fengxia Wei, David Boon Kiang Lim, Chengliang Sun, Kui Yao

16 March 2024

Yin, J., Wong, V., Xu, Q., Subhodayam, P. T. C., Yousry, Y. M., Shashidhara, A., Zhou, J., Luo, P., Lim, P. C., Wei, F., Lim, D. B. K., Sun, C., & Yao, K. (2024). Conformable Shear Mode Transducers from Lead‐Free Piezoelectric Ceramic Coatings: An Innovative Ultrasonic Solution for Submerged Structural Health Monitoring. Advanced Functional Materials, 34(32). Portico. https://doi.org/10.1002/adfm.202401544

AbstractShear mode‐guided ultrasonic waves are highly regarded for submerged or subterranean structural health monitoring (SHM), owing to their non‐dispersive feature and minimized acoustic energy loss when in contact with liquid or solid. High‐performance shear mode ceramic ultrasonic transducers with robustness and cost‐effectiveness are highly demanded for underwater or underground SHM applications, especially in harsh environments. However, the implementation of discrete shear mode piezoelectric ceramic ultrasonic transducers is hindered by the inconsistency with manual installation, lack of conformability on curved surfaces, and unreliable acoustic coupling between the transducers and the structure. Here, direct‐write conformable shear mode ultrasonic transducers made from piezoelectric lead‐free ceramic coatings, which are in situ produced on steel structures by a scalable thermal spray process, are proposed. The obtained lead‐free lithium‐doped potassium sodium niobate (KNN‐LN) ceramic coatings exhibit a high effective shear piezoelectric strain coefficient (d24, f) above 60 pm V−1 in a broad frequency range from 100 Hz to 200 kHz. The resulting conformable shear mode KNN‐LN ceramic coating transducers successfully showcase the functions of exciting and detecting stable shear mode ultrasonic wave signals with operation temperature exceeding 200 °C and demonstrate reliable capability in defect detection in both air and liquid environments.

Publisher Copyright

This research / project is supported by the A*STAR - RIE2020 AME Industry Alignment Fund–Pre-positioning Programme
Grant Reference no. : A20F5a0043

This research / project is supported by the A*STAR - AME Programmatic Fund
Grant Reference no. : A20G9b0135

This is the peer reviewed version of the following article: [Jie Yin, Voon-Kean Wong, Qinwen Xu, Percis Teena Christopher Subhodayam, Yasmin Mohamed Yousry, Acharya Shashidhara, Jie Zhou, Ping Luo, Poh Chong Lim, FengXia Wei, David Boon Kiang Lim, Chengliang Sun, Kui Yao. Conformable Shear Mode Transducers from Lead-Free Piezoelectric Ceramic Coatings: An Innovative Ultrasonic Solution for Submerged Structural Health Monitoring. Advanced Functional Materials 10.1002/adfm.202401544 (2024)], which has been published in final form at [http://dx.doi.org/10.1002/adfm.202401544]. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited

https://oar.a-star.edu.sg/communities-collections/articles/20725

1616-301X
1616-3028

Institute of Materials Research and Engineering