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This version was published on March 1, 2008
Journal of Intelligent Material Systems and Structures, Vol. 19, No. 3, 277-281 (2008)
DOI: 10.1177/1045389X07083619

Study of RAINBOW Actuator and its Intergation with SMA

Xing Shen

College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics 29 Yudao Street, Nanjing 210016, China, shenx{at}nuaa.edu.cn

Yang Yu

Institute of Machinery Manufacturing Technology, China Academy of Engineering Physics 64 Mianshan Road, Mianyang 621900, China

Yun Li

College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics 29 Yudao Street, Nanjing 210016, China

A new kind of large-displacement piezoelectric actuator — reduced and internally biased oxide wafer (RAINBOW) actuator composed of reduced and unreduced layers, is prepared from PZT (Pb(ZrxTi1-x)O 3) by chemical reduction. Its phase components, microstructure, and actuating properties are also researched. It is found that the displacement of reduced RAINBOW PZT is three times larger than that of the traditional PZT; however, re-oxide phases are found in the reduced layer of composite PZT, showing that the reduction procedure needs to be improved. Furthermore, the possibility of the integration between PZT and shape memory alloy (SMA) is explored. Physical vapor deposition (PVD) method is applied to depose SMA films on the reduced layer of RAINBOW PZT patches. Results of mechanical and actuating experiments show that this kind of integration is a reasonable idea to manufacture actuators with better performance.

Key Words: RAINBOW • actuator • PZT • SMA • PVD.


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