Lead-free acoustic emission sensors

Kwok Ho Lam; D. M. Lin; H. L.W. Chan

doi:10.1063/1.2814024

Lead-free acoustic emission sensors

Kwok Ho Lam, D. M. Lin, H. L.W. Chan

The Hong Kong Polytechnic University

Research output: Journal article publication › Journal article › Academic research › peer-review

12 Citations (Scopus)

Abstract

Acoustic emission (AE) sensors have been fabricated using both soft- and hard-type lead-free (Na0.5 K0.5) Nb O3 -based ceramics. The acoustic and electromechanical properties of the ceramics have been determined using the resonance technique. The lead-free AE sensors were calibrated using a laser source and compared to a commercial sensor. A lead zirconate titanate (PZT) 5H ceramics AE sensor has also been fabricated and calibrated for comparison. It was found that the sensitivity of lead-free AE sensors is comparable to that of the lead-based PZT sensor. To evaluate the sensors for potential application, they have been used in the detection of AE in an impact test. The lead-free sensors can reproduce AE signals accurately without giving artifacts and have potential use in commercial AE systems.

Original language	English
Article number	115109
Journal	Review of Scientific Instruments
Volume	78
Issue number	11
DOIs	https://doi.org/10.1063/1.2814024
Publication status	Published - 10 Dec 2007

ASJC Scopus subject areas

Instrumentation

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10.1063/1.2814024

http://hdl.handle.net/10397/634

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AB - Acoustic emission (AE) sensors have been fabricated using both soft- and hard-type lead-free (Na0.5 K0.5) Nb O3 -based ceramics. The acoustic and electromechanical properties of the ceramics have been determined using the resonance technique. The lead-free AE sensors were calibrated using a laser source and compared to a commercial sensor. A lead zirconate titanate (PZT) 5H ceramics AE sensor has also been fabricated and calibrated for comparison. It was found that the sensitivity of lead-free AE sensors is comparable to that of the lead-based PZT sensor. To evaluate the sensors for potential application, they have been used in the detection of AE in an impact test. The lead-free sensors can reproduce AE signals accurately without giving artifacts and have potential use in commercial AE systems.

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Lead-free acoustic emission sensors

Abstract

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