| Autor: |
Martina Mennicken, Eckhard Quandt, Tobias Sterzl, Hartwig Hoecker, Helmut Keul, Bernhard Winzek, René Nagelsdiek |
| Rok vydání: |
2003 |
| Předmět: |
|
| Zdroj: |
Smart Structures and Materials 2003: Active Materials: Behavior and Mechanics. |
| ISSN: |
0277-786X |
| DOI: |
10.1117/12.484696 |
| Popis: |
Shape memory alloys (SMA) are able to provide high work output when they undergo the martensitic transformation. Therefore, they present a favorable actuation mechanism for microsystems, e.g. for microvalves, switches or microgrippers. Sputter deposited thin SMA films are already in use as free-standing films or as composites in combination with a substrate. In the case of a composite, the substrate works as a bias spring and enables the SMA actuator to show a two way behavior. To enlarge the potentialities of shape memory based actuators a bistable principle is presented. This is realized by the combination with a polymer exhibiting a glass transition temperature (Tg) between the hysteresis loop of the shape memory composite. The fabrication of this composite is described with a special emphasis on the development of suitable polymer samples. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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