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Subproject A1
Manufacturing Technologies for Integratable Piezoelectric Fibers and Laminates
Project Manager:
Prof. Dr. rer. nat. habil. Alexander MichaelisDresden University of Technology
Faculty of Mechanical Engineering
Institute for Inorganic Non-Metallic Materials
Telephone: +49-(0)351 / 2553-512
Telefax: +49-(0)351 / 2553-600
E-Mail: alexander.michaelis@ikts.fraunhofer.de
Presenting the Research Program
This subproject focuses on the subject of piezoelectric fibers and laminates for the production of adaptive structure components that are suitable for serial production. The mechanical components are to feature an utilizable multifunctional profile for structural dynamical applications. Hence, robust, undamaged and functionally integratable piezo components are required.
For the integration into thermoplastic composite structures (A5) and into microstructured lightmetal plates (A2), piezo fibers with a diameter of 70 - 300 µm are to be developed which have an optimized actuatory effect and that are mountable with hardly being damaged as well as formable in the metal composite. Until now, such a property profile has not been realized and it is to be achieved in the project by optimizing the chemical composition, microstructure, geometry and the specific setting of the polarization. For the first time, sapphire fibers are produced by means of the polysulfon process.
The piezo modules based on PZT-laminates are to be produced from composites of piezoceramic layers or piezoceramic plates and further inorganic materials so that they have no defects and functional limitations after the manufacturing step of pressure casting. In this process the modules are mechanically and thermally stressed for a short time (< 100 ms) by filling a mold with molten metal heated up to 700 °C. After a subsequent cooling, pressure is built up due to thermal misfit. Such piezo modules completely consisting of inorganic materials and tolerating temperatures of up to 700 °C in manufacturing steps are not known yet.
It is the aim of the first project phase to work out the material technological and manufacturing technical fundamentals for the production of functionally optimized PZT-fibers and casting technically integratable piezo laminates. In this subproject, solutions for integratable actuator modules are examined on the basis of a funded selection or production, characterization and packing of piezoceramics. Thereby, the realization of the overall research project significantly contributes to the production of adaptive structure components (A2, A5, B3), provisions of piezoceramic components and material data (C1) as well as to methodical developments (A4, C3).
For the integration into thermoplastic composite structures (A5) and into microstructured lightmetal plates (A2), piezo fibers with a diameter of 70 - 300 µm are to be developed which have an optimized actuatory effect and that are mountable with hardly being damaged as well as formable in the metal composite. Until now, such a property profile has not been realized and it is to be achieved in the project by optimizing the chemical composition, microstructure, geometry and the specific setting of the polarization. For the first time, sapphire fibers are produced by means of the polysulfon process.
The piezo modules based on PZT-laminates are to be produced from composites of piezoceramic layers or piezoceramic plates and further inorganic materials so that they have no defects and functional limitations after the manufacturing step of pressure casting. In this process the modules are mechanically and thermally stressed for a short time (< 100 ms) by filling a mold with molten metal heated up to 700 °C. After a subsequent cooling, pressure is built up due to thermal misfit. Such piezo modules completely consisting of inorganic materials and tolerating temperatures of up to 700 °C in manufacturing steps are not known yet.
It is the aim of the first project phase to work out the material technological and manufacturing technical fundamentals for the production of functionally optimized PZT-fibers and casting technically integratable piezo laminates. In this subproject, solutions for integratable actuator modules are examined on the basis of a funded selection or production, characterization and packing of piezoceramics. Thereby, the realization of the overall research project significantly contributes to the production of adaptive structure components (A2, A5, B3), provisions of piezoceramic components and material data (C1) as well as to methodical developments (A4, C3).
