A process chain for integrating piezoelectric transducers into aluminum die castings to generate smart lightweight structures

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autor(en): Stein S, Wedler J, Rhein S, Schmidt M, Körner C, Michaelis A, Gebhardt S
Zeitschrift: Results in Physics
Jahr der Veröffentlichung: 2017
ISSN: 2211-3797
Sprache: Englisch


Abstract


The application of piezoelectric transducers to structural body parts of machines or vehicles enables the combination of passive mechanical components with sensor and actuator functions in one single structure. According to Herold et al. [1] and Staeves [2] this approach indicates significant potential regarding smart lightweight construction. To obtain the highest yield, the piezoelectric transducers need to be integrated into the flux of forces (load path) of load bearing structures. Application in a downstream process reduces yield and process efficiency during manufacturing and operation, due to the necessity of a subsequent process step of sensor/actuator application. The die casting process offers the possibility for integration of piezoelectric transducers into metal structures. Aluminum castings are particularly favorable due to their high quality and feasibility for high unit production at low cost (Brunhuber [3], Nogowizin [4]). Such molded aluminum parts with integrated piezoelectric transducers enable functions like active vibration damping, structural health monitoring or energy harvesting resulting in significant possibilities of weight reduction, which is an increasingly important driving force of automotive and aerospace industry (Klein [5], Siebenpfeiffer [6]) due to increasingly stringent environmental protection laws. In the scope of those developments, this paper focuses on the entire process chain enabling the generation of lightweight metal structures with sensor and actuator function, starting from the manufacturing of piezoelectric modules over electrical and mechanical bonding to the integration of such modules into aluminum (Al) matrices by die casting. To achieve this challenging goal, piezoceramic sensors/actuator modules, so-called LTCC/PZT modules (LPM) were developed, since ceramic based piezoelectric modules are more likely to withstand the thermal stress of about 700 °C introduced by the casting process (Flössel et al., [7]). The modules are made of low temperature cofired ceramic (LTCC) tapes with an embedded lead zirconate titanate (PZT) plate and are manufactured in multilayer technique. For joining conducting copper (Cu) wires with the electrode structure of the LPM, a novel laser drop on demand wire bonding method (LDB) is applied, which is based on the melting of a spherical CuSn12 braze preform with a liquidus temperature Tliquid of 989.9 °C (Deutsches Kupfer-Institut Düsseldorf, [8]) providing sufficient thermal stability for a subsequent casting process.



FAU-Autoren / FAU-Herausgeber

Körner, Carolin Prof. Dr.-Ing.
Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)
Schmidt, Michael Prof. Dr.-Ing.
Lehrstuhl für Photonische Technologien
Stein, Stefan
Lehrstuhl für Photonische Technologien
Wedler, Jonathan
Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)


Autor(en) der externen Einrichtung(en)
Fraunhofer-Institut für Keramische Technologien und Systeme (IKTS)
Technische Universität Dresden


Zitierweisen

APA:
Stein, S., Wedler, J., Rhein, S., Schmidt, M., Körner, C., Michaelis, A., & Gebhardt, S. (2017). A process chain for integrating piezoelectric transducers into aluminum die castings to generate smart lightweight structures. Results in Physics. https://dx.doi.org/10.1016/j.rinp.2017.07.034

MLA:
Stein, Stefan, et al. "A process chain for integrating piezoelectric transducers into aluminum die castings to generate smart lightweight structures." Results in Physics (2017).

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Zuletzt aktualisiert 2018-17-10 um 04:40