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Brazing Coupling Performance of Piezoelectric Waveguide Transducers for the Monitoring of High Temperature Components

Piezoelectric waveguide transducers possess great potential for the online monitoring of high temperature critical components, in order to improve their operational safety. Due to the use of a waveguide bar, the sensory device is not susceptible to high temperature environments, which enables the lo...

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Autores principales: Jia, Jiu Hong, Wang, Ze Hou, Yao, Dai Feng, Tu, Shan-Tung
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7794867/
https://www.ncbi.nlm.nih.gov/pubmed/33375711
http://dx.doi.org/10.3390/s21010094
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author Jia, Jiu Hong
Wang, Ze Hou
Yao, Dai Feng
Tu, Shan-Tung
author_facet Jia, Jiu Hong
Wang, Ze Hou
Yao, Dai Feng
Tu, Shan-Tung
author_sort Jia, Jiu Hong
collection PubMed
description Piezoelectric waveguide transducers possess great potential for the online monitoring of high temperature critical components, in order to improve their operational safety. Due to the use of a waveguide bar, the sensory device is not susceptible to high temperature environments, which enables the long-term service of the piezoelectric transducers. However, the coupling between the waveguide bar and the high-temperature component has been proven to be the most important part of the monitoring system. In order to effectively transmit waves through the junction of the waveguide bar and the monitoring target, it is necessary to research a reliable coupling method to connect the waveguide transducers with the host structure. In the present research, the feasibility of brazing coupling for wave propagation through the junction was investigated through experiments. Piezoelectric waveguide transducers were welded using various kinds of brazing filler metals. The experimental results indicate that the coupling effects of the brazing welding depend on the filler metals. At the same time, some filler metals for the effective coupling of the transducer and the target monitoring component were identified. The brazing coupling method was verified that it can non-dispersively and effectively propagate waves into the host structure with much better reliability than the conventional dry coupling approach. Moreover, the high-temperature experimental results show that the brazing-coupled waveguide bar system can work reliably and stably in high temperatures at 300 °C for a long time. This work strives to pave a solid foundation for the application of piezoelectric waveguide transducers for the structural health monitoring of high temperature critical components.
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spelling pubmed-77948672021-01-10 Brazing Coupling Performance of Piezoelectric Waveguide Transducers for the Monitoring of High Temperature Components Jia, Jiu Hong Wang, Ze Hou Yao, Dai Feng Tu, Shan-Tung Sensors (Basel) Letter Piezoelectric waveguide transducers possess great potential for the online monitoring of high temperature critical components, in order to improve their operational safety. Due to the use of a waveguide bar, the sensory device is not susceptible to high temperature environments, which enables the long-term service of the piezoelectric transducers. However, the coupling between the waveguide bar and the high-temperature component has been proven to be the most important part of the monitoring system. In order to effectively transmit waves through the junction of the waveguide bar and the monitoring target, it is necessary to research a reliable coupling method to connect the waveguide transducers with the host structure. In the present research, the feasibility of brazing coupling for wave propagation through the junction was investigated through experiments. Piezoelectric waveguide transducers were welded using various kinds of brazing filler metals. The experimental results indicate that the coupling effects of the brazing welding depend on the filler metals. At the same time, some filler metals for the effective coupling of the transducer and the target monitoring component were identified. The brazing coupling method was verified that it can non-dispersively and effectively propagate waves into the host structure with much better reliability than the conventional dry coupling approach. Moreover, the high-temperature experimental results show that the brazing-coupled waveguide bar system can work reliably and stably in high temperatures at 300 °C for a long time. This work strives to pave a solid foundation for the application of piezoelectric waveguide transducers for the structural health monitoring of high temperature critical components. MDPI 2020-12-25 /pmc/articles/PMC7794867/ /pubmed/33375711 http://dx.doi.org/10.3390/s21010094 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Letter
Jia, Jiu Hong
Wang, Ze Hou
Yao, Dai Feng
Tu, Shan-Tung
Brazing Coupling Performance of Piezoelectric Waveguide Transducers for the Monitoring of High Temperature Components
title Brazing Coupling Performance of Piezoelectric Waveguide Transducers for the Monitoring of High Temperature Components
title_full Brazing Coupling Performance of Piezoelectric Waveguide Transducers for the Monitoring of High Temperature Components
title_fullStr Brazing Coupling Performance of Piezoelectric Waveguide Transducers for the Monitoring of High Temperature Components
title_full_unstemmed Brazing Coupling Performance of Piezoelectric Waveguide Transducers for the Monitoring of High Temperature Components
title_short Brazing Coupling Performance of Piezoelectric Waveguide Transducers for the Monitoring of High Temperature Components
title_sort brazing coupling performance of piezoelectric waveguide transducers for the monitoring of high temperature components
topic Letter
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7794867/
https://www.ncbi.nlm.nih.gov/pubmed/33375711
http://dx.doi.org/10.3390/s21010094
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