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Electrochemical Dealloying with Simultaneous Phase Separation

33 Pages Posted: 20 Nov 2018 First Look: Accepted

See all articles by Yuqiao Zeng

Yuqiao Zeng

Southeast University (China) - Jiangsu Key Laboratory of Advanced Metallic Materials

Bernard Gaskey

Johns Hopkins University - Department of Materials Science and Engineering

Ellen Benn

Johns Hopkins University - Department of Materials Science and Engineering

Ian McCue

Johns Hopkins University - Department of Materials Science and Engineering

Gina Greenidge

Johns Hopkins University - Department of Materials Science and Engineering

Kenneth J. Livi

Johns Hopkins University - Department of Materials Science and Engineering

Xhuai Zhang

Southeast University (China) - Jiangsu Key Laboratory of Advanced Metallic Materials

Jianqing Jiang

Southeast University (China) - Jiangsu Key Laboratory of Advanced Metallic Materials

Jonah Erlebacher

Johns Hopkins University - Department of Materials Science and Engineering

Abstract

Dealloying is a selective corrosion process during which the more electrochemically active elements in a parent alloy dissolve while the remaining more noble atoms diffuse along the solid-electrolyte interface, resulting in the formation of a nanoporous microstructure composed of core-shell ligaments. In this work, we study an extension of the physics of dealloying in which the parent alloys (Cu-Fe-Mn alloys) contained an engineered composition of elements selected such that, upon dissolution of one of them, the remaining elements phase separate as they become concentrated in the undissolved ligaments. Such simultaneous dealloying and phase separation leads to the formation of rich variety of new porous structures containing nanocomposite ligaments, as well as unanticipated structure evolution such as nanowire growth that are attributed to solution side effects.

Keywords: Nanoporous, Corrosion, Nanocomposite, Phase separation, Dealloying

Suggested Citation

Zeng, Yuqiao and Gaskey, Bernard and Benn, Ellen and McCue, Ian and Greenidge, Gina and Livi, Kenneth J. and Zhang, Xhuai and Jiang, Jianqing and Erlebacher, Jonah, Electrochemical Dealloying with Simultaneous Phase Separation (November 20, 2018). Available at SSRN: https://ssrn.com/abstract=3287448

Yuqiao Zeng (Contact Author)

Southeast University (China) - Jiangsu Key Laboratory of Advanced Metallic Materials

Sipailou 2
Nanjing, Jiangsu Province 210096
China

Bernard Gaskey

Johns Hopkins University - Department of Materials Science and Engineering

Baltimore, MD 20036-1984
United States

Ellen Benn

Johns Hopkins University - Department of Materials Science and Engineering

Baltimore, MD 20036-1984
United States

Ian McCue

Johns Hopkins University - Department of Materials Science and Engineering

Baltimore, MD 20036-1984
United States

Gina Greenidge

Johns Hopkins University - Department of Materials Science and Engineering

Baltimore, MD 20036-1984
United States

Kenneth J. Livi

Johns Hopkins University - Department of Materials Science and Engineering

Baltimore, MD 20036-1984
United States

Xhuai Zhang

Southeast University (China) - Jiangsu Key Laboratory of Advanced Metallic Materials

Sipailou 2
Nanjing, Jiangsu Province 210096
China

Jianqing Jiang

Southeast University (China) - Jiangsu Key Laboratory of Advanced Metallic Materials

Sipailou 2
Nanjing, Jiangsu Province 210096
China

Jonah Erlebacher

Johns Hopkins University - Department of Materials Science and Engineering ( email )

Baltimore, MD 20036-1984
United States

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