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Proceedings Paper

Hydrogen-induced actuation: a new active mechanism for MEMS
Author(s): Yi Zhang; Guifu Ding; Chunsheng Yang; Aibin Yu; Bingchu Cai
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Paper Abstract

A novel electrochemical actuation based on the hydrogen aborbing-desorping of metal is presented. The hydrogen aborbing-desorping of metal was accompanying with the volume swelling and shrinking, which could be used to convert electrical energy into mechanical energy. This type of actuation not only has usual advantages of electrochemical actuation such as long travel distance and acoustical quiet, but also there was no the concerns of gas leakage of those electrochemical actuation driven by the gas pressure built up by electrolysis of an aqueous electrolyte solution. In this work, a mischmetal (Mm)-Ni based alloy film, MmNi5, was prepared by sputtering method. The MmNi5 film was studied by x-ray diffraction method (XRD) and electrochemical method. It was found that the metal film had undergone phase transformation during its hydrogen absorbing and desorbing cycle, which was first time to be observed for the metal hydride film prepared by sputtering method. The further results of surface micromaching and scanning electron microscope (SEM) indicated that the hydrogen-induced actuation was applicable in MEMS.

Paper Details

Date Published: 15 October 2001
PDF: 7 pages
Proc. SPIE 4601, Micromachining and Microfabrication Process Technology and Devices, (15 October 2001); doi: 10.1117/12.444699
Show Author Affiliations
Yi Zhang, Shanghai Jiao Tong Univ. (China)
Guifu Ding, Shanghai Jiao Tong Univ. (China)
Chunsheng Yang, Shanghai Jiao Tong Univ. (China)
Aibin Yu, Shanghai Jiao Tong Univ. (China)
Bingchu Cai, Shanghai Jiao Tong Univ. (China)

Published in SPIE Proceedings Vol. 4601:
Micromachining and Microfabrication Process Technology and Devices
Norman C. Tien; Qing-An Huang, Editor(s)

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