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Proceedings Paper

Development of multifunctional wire that combines shape-memory alloy to piezo electric material
Author(s): Hiroshi Sato
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Paper Abstract

The shape-memory alloy, for example NiTi (Nickel Titanium), is used for an actuator and frame by the shape- memory effect and the super-elasticity effect. And piezoelectric material, for example PZT (Lead Zirconate Titanate), is used for an actuator and sensor by the piezoelectric effect and the pyroelectric effect. However, each of the materials has been used for the sensor and the actuator independently because the principle of the function of each of materials is different. In this research, a new multi functional device combines these four functions is developed by coating the PZT thin film of 20μm to the surface of the NiTi wire by the chemical reaction by using the hydrothermal crystallization method. We succeeded in the detection of the displacement at a super-elastic deformation of this multi functional device from the piezoelectric effect of the PZT film on the surface. By combining each effects, the multifunctional device can be used for a self-sensing actuator, wherein the transformation by the shape-memory effect is detected by the piezoelectric effect or the pyroelectric effect, and the rough and precision actuator performs the rough movement by the shape memory effect and performs the precise movement by the piezoelectric effect.

Paper Details

Date Published: 2 April 2008
PDF: 7 pages
Proc. SPIE 6929, Behavior and Mechanics of Multifunctional and Composite Materials 2008, 69291I (2 April 2008); doi: 10.1117/12.779754
Show Author Affiliations
Hiroshi Sato, National Institute of Advanced Industrial Science and Technology (Japan)

Published in SPIE Proceedings Vol. 6929:
Behavior and Mechanics of Multifunctional and Composite Materials 2008
Marcelo J. Dapino; Zoubeida Ounaies, Editor(s)

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