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Acoustic emission signal detection by ceramic/polymer composite piezoelectrets embedded in glass‐epoxy laminates
Author(s) -
Wenger M. P.,
Blanas P.,
Shuford R. J.,
DasGupta D. K.
Publication year - 1996
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.10696
Subject(s) - materials science , acoustic emission , epoxy , composite material , piezoelectricity , ceramic , transducer , composite number , polymer , ferroelectricity , characterization (materials science) , signal (programming language) , lead titanate , acoustics , optoelectronics , dielectric , physics , nanotechnology , computer science , programming language
Piezoelectric composites, consisting of a ferroelectric ceramic powder of calcium‐modified lead titanate dispersed in two different polymer matrices, viz. from vinylidene fluoride trifluoroethylene and an epoxy, have been fabricated. The composites show a mixed connectivity structure, and the results of electromechanical characterization are given. Thin films of these materials have been incorporated into surface mounted acoustic emission sensors and their frequency response and ability to detect plate waves, generated by a simulated acoustic emission source, has been examined. In situ transducers embedded into glass‐reinforced laminate plates have also been examined and have been shown suitable for acoustic emission sensors.