Transducers for non-destructive evaluation at high temperatures

M. Kobayashi and C.-K. Jen,     Industrial Materials Institute, Canada


Transducers fabricated from sol-gel composites are used in high-temperature non-destructive evaluation because of their suitable frequency range, high-temperature stability, thermal-cycle durability, high signal-to-noise ratio, broadband frequency characteristics, good acoustic bonding and curved-surface conformability.The chapter introduces sol-gel composites and transducers made from them, such as the integrated ultrasonic transducer (IUT), buffer-rod IUT, wedge IUT and flexible ultrasonic transducer (FUT). There are applications for structural-health monitoring, including barrel and screw wear ...

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