ELECTROCHEMICAL ACTUATION OF NANOPOROUS GOLD DEFORMED BY COMPRESSION

doi:10.3724/SP.J.1037.2013.00664

Acta Metall Sin

2014, Vol. 50

Issue (2): 252-258 DOI: 10.3724/SP.J.1037.2013.00664

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ELECTROCHEMICAL ACTUATION OF NANOPOROUS GOLD DEFORMED BY COMPRESSION

YE Xinglong, LIU Feng, JIN Haijun(

)

Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016

Cite this article:

YE Xinglong, LIU Feng, JIN Haijun. ELECTROCHEMICAL ACTUATION OF NANOPOROUS GOLD DEFORMED BY COMPRESSION. Acta Metall Sin, 2014, 50(2): 252-258.

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Abstract

The electrochemical actuation performance of nanoporous gold samples deformed by compression was investigated. Although the porosity and specific surface area decrease with increasing compression strain, the strain amplitude of actuation which were measured along the compression direction, increases and then decreases with increasing compression strain. The compression also greatly increases the strain energy density of nanoporous gold actuator. The improvement of actuation performance is attributed to the morphology change of nanoporous structure during compression. The understanding of the underlying mechanism requires quantitative characterization of morphology and morphological evolution of nanoporous structure during compression.

Key words: nanoporous gold dealloying corrosion electrochemical actuation compression porosity

Received: 21 October 2013

ZTFLH:

TG146

Fund: Supported by National Basic Research Program of China (No.2012CB932202) and National Natural Science Foundation of China (Nos.51171183 and 51222105)

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https://www.ams.org.cn/EN/10.3724/SP.J.1037.2013.00664 OR https://www.ams.org.cn/EN/Y2014/V50/I2/252

Fig.1

纳米多孔金样品的SEM像及压缩应力-应变曲线(加载速率为5×10^-4 s^-1)

Fig.2

变形前后纳米多孔金的电化学驱动行为

Fig.3

比表面积、驱动幅度和致密度随压缩变形量的变化, 以及压缩变形态样品的驱动幅度和比表面积随致密度的变化

Fig.4

纳米多孔金的弹性模量、驱动可逆变形能量密度以及流变应力随压缩变形量的变化

Fig.5

结构参数Θ随压缩应变量的变化

Fig.6

不同压缩变形量的纳米多孔金样品的SEM像

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