Integrated ultrasonic transducers made by the sol–gel spray technique for structural health monitoring

Kobayashi, Makiko; Jen, C. K.; Moisan, J.; Mrad, Nezih; Nguyen, Sébastien

doi:10.1088/0964-1726/16/2/009

Cited by 14 publications

(16 citation statements)

References 14 publications

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“…In this study the fabrication of the FUT arrays based on a sol-gel spray technique consists of six main steps (11)(12)(13) : (1) preparing a high dielectric constant PZT sol-gel solution, (2) ball milling the piezoelectric PZT powders in a PZT sol-gel solution to submicron sizes, (3) sensor spraying using slurries from steps (1) and (2) to produce a film with thicknesses of between 5 and 20 µm, (4) heat treating to produce a solid PZT-c thick film, (5) Corona poling to obtain piezoelectricity, and (6) silver paste painting or colloidal silver spray with a mask to deposit top electrodes. Steps (3) and (4) are performed multiple times to produce optimal film thicknesses for specified ultrasonic operating frequencies.…”

Section: Instruments and Equipmentsmentioning

confidence: 99%

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Flexible ultrasonic transducer arrays for health monitoring of an aircraft component

Liu

Jen

et al. 2011

Insight - Non-Destructive Testing and Condition Monitoring

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Section: Instruments and Equipmentsmentioning

confidence: 99%

“…Integrated UTs (IUTs) (11) and flexible UTs (FUTs) (12) would satisfy the above mentioned basic requirements. In our past research, integrated ultrasonic transducers (IUTs) were used on bare aluminum (Al) plates to demonstrate this capability for crack growth monitoring (13) .…”

Section: Introductionmentioning

confidence: 99%

Flexible ultrasonic transducer arrays for health monitoring of an aircraft component

Liu

Jen

et al. 2011

Insight - Non-Destructive Testing and Condition Monitoring

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“…Kobayashi et al 23 . used the sol‐gel spray technique to deposit PZT/PZT sol‐gel composite directly onto selected substrates including graphite/epoxy, aluminium and steel.…”

Section: Development Of Piezoelectric Paintmentioning

confidence: 99%

“…Piezoelectric composites consisting of ferroelectric ceramics and polymer have received considerable interest as sensing elements because of their favourable material properties that often cannot be obtained in single‐phase materials. Particularly, polymer‐based piezoelectric paints have been investigated by a few researchers as a potential substitute for piezoelectric ceramics in certain sensing applications 13–24 . Piezoelectric paint comprises tiny piezoelectric particles randomly dispersed within a polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

Analytical study of piezoelectric paint sensor for acoustic emission‐based fracture monitoring

Zhang

2008

Fatigue Fract Eng Mat Struct

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A B S T R A C T Analytical study of piezoelectric paint, which provides insight about its key material behaviour in ultrasonic sensing, is the focus of this paper. Piezoelectric paint is a composite piezoelectric material that comprises tiny piezoelectric particles randomly dispersed within a polymer matrix phase. Acoustic emission (AE) technique has been used for non-destructive evaluation (NDE) such as fracture monitoring in metal, concrete and composite structures. The feasibility of using piezoelectric paint for AE sensing has been demonstrated. In the context of piezoelectric paint-based AE sensor, models for the key material properties of piezoelectric paint are reviewed first. The effect of piezoelectric ceramic volume fraction on paint sensor response is examined. A coupled field finite element model was established to carry out the electro-mechanical analysis of piezoelectric paint sensor subjected to AE excitation. The simulation model for piezoelectric paint sensor is calibrated with experimental data. While more extensive research needs to be done to characterize piezoelectric paint sensor for fracture monitoring, such an analytical study proves to be very useful to the optimization of piezoelectric paint formulation and sensor geometry for AE sensor.

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“…• C [15]; however, the lower the fabrication temperature the lower is the ultrasonic signal strength. These IUTs can be employed in operational temperatures, ranging from −80…”

Section: Ultrasonic Sensormentioning

confidence: 99%

In situice and structure thickness monitoring using integrated and flexible ultrasonic transducers

Liu¹,

Wu²,

Kobayashi³

et al. 2008

Smart Mater. Struct.

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Two types of ultrasonic sensors are presented for in situ capability development of ice detection and structure thickness measurement. These piezoelectric film based sensors have been fabricated by a sol-gel spray technique for aircraft environments and for temperatures ranging from −80 to 100• C. In one sensor type, piezoelectric films of thickness greater than 40 µmare deposited directly onto the interior of a 1.3 mm thick aluminum (Al) alloy control surface (stabilizer) of an aircraft wing structure as integrated ultrasonic transducers (UTs). In the other sensor type, piezoelectric films are coated onto a 50 µm thick polyimide membrane as flexible UTs. These were subsequently glued onto similar locations at the same control surfaces. In situ monitoring of stabilizer outer skin thickness was performed. Ice build-up ranging from a fraction of 1 mm to less than 1.5 mm was also detected on a 3 mm thick Al plate. Measurements using these ultrasonic sensors agreed well with those obtained by a micrometer. Tradeoffs of these two approaches are presented.

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Integrated ultrasonic transducers made by the sol–gel spray technique for structural health monitoring

Cited by 14 publications

References 14 publications

Flexible ultrasonic transducer arrays for health monitoring of an aircraft component

Flexible ultrasonic transducer arrays for health monitoring of an aircraft component

Analytical study of piezoelectric paint sensor for acoustic emission‐based fracture monitoring

In situice and structure thickness monitoring using integrated and flexible ultrasonic transducers

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