Fabrication of metal–polymer matching layers to improve some ultrasonic transducers for NDT and calibration

Abstract This paper investigates the impact of different matching layers on ultrasonic transducers’ performance. Matching are mostly used to solve acoustic impedance problem between piezoelectric element and test specimen. To design good layers, we merged metal–polymer mass–spring systems. Their thickness was also optimized using quarter-wavelength approach. Silver, alumina, copper served as mass components, while parylene polymer spring component. first time use such materials with lead zirconate titanate (PZT) transducers. The sensitivity increased, beam diameter broadened, signal-to-noise ratio reduced, echo-height increased. According findings, developed were extremely efficient in upgrading PZT transducers, making them ideal for a variety non-destructive applications identifying defects various materials. In addition, new transducers may be useful calibration.