Title
Lifetime of piezoceramic multilayer actuators: Interplay of material properties and actuator design
Author
van den Ende, D.A.
Bos, B.
Groen, W.A.
Dortmans, L.M.J.G.
TNO Industrie en Techniek
Publication year
2009
Abstract
We report an investigation into factors limiting the functional lifetime of multilayer piezoceramic actuators. The study consists of a combination of lifetime experiments by means of an accelerated lifetime test, inspection of the actuator microstructure at different stages of the accelerated lifetime test, and numerical simulation of the displacements and mechanical stresses that arise during actuator performance. During the lifetime test, both displacement and electrical properties were measured. The results show a clear correlation between the microstructure and the mechanical stresses in the actuator, giving evidence that crack initiation starts early in actuator lifetime and humidity effects accelerate degradation. The numerical simulations performed provide clues for optimization of the actuator design with respect to stress development and performance. Attention is paid to the choice of adhesive interlayer and its effect on the performance and lifetime of the actuator. © 2008 Springer Science+Business Media, LLC.
Subject
Electronics
Actuators
Failure analysis
Piezoelectric properties
PZT
Computer simulation
Electric properties
Failure analysis
Microstructure
Multilayers
Piezoelectric materials
Piezoelectric transducers
Piezoelectricity
Quality assurance
Safety factor
Semiconducting lead compounds
Actuator designs
Actuator performance
Adhesive interlayers
Electrical properties
Humidity effects
Lifetime tests
Material properties
Mechanical stress
Multilayer actuators
Numerical simulations
Piezo-ceramic actuators
Piezoceramic
Piezoelectric properties
Stress development
Piezoelectric actuators
To reference this document use:
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TNO identifier
241366
ISSN
1385-3449
Source
Journal of Electroceramics, 22 (1-3), 163-170
Document type
article