Comparison of the performance of pmn-pt single-crystal and ceramic composite arrays for NDE applications
This paper describes a theoretical and experimental investigation into the performance of wideband 1–3 composite arrays utilising pzt5h ceramic and pmn-pt single-crystal as the active materials. Six-element prototype arrays were manufactured with a centre frequency of approximately 2.25 MHz. The comparison of the single-crystal and pzt5h devices is based on laser vibrometer surface displacement cross-talk measurements and electrical impedance measurements as well as transmit and receive measurements in water. The measured electrical impedance and mechanical cross-talk from the manufactured arrays correlates well with that predicted using the FE software package PZFlex. Moreover, the design techniques obtained from PZFlex, are shown to produce arrays with low cross-talk. Overall, the single-crystal device shows considerably improved performance over the pzt5h device as demonstrated by its higher bandwidth and superior pulse-echo performance.
Document Type: Research Article
Affiliations: 1: Centre for Ultrasonic Engineering, Department of Electronic and Electrical Engineering, The University of Strathclyde, Glasgow, Scotland, G1 1XW.; Alba Ultrasound Limited, Glasgow, Scotland, G4 9XG. 2: Centre for Ultrasonic Engineering, Department of Electronic and Electrical Engineering, The University of Strathclyde, Glasgow, Scotland, G1 1XW. 3: Alba Ultrasound Limited, Glasgow, Scotland, G4 9XG.
Publication date: 2006-02-01
- Official Journal of The British Institute of Non-Destructive Testing - includes original research and devlopment papers, technical and scientific reviews and case studies in the fields of NDT and CM.
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