Formation of nanoporous copper through dealloying of dual-phase Cu-Mn-Al alloy: The evolution of microstructure and composition

Journal of Materials Research volume 27, pages2771–2778(2012)Cite this article

Abstract

A freestanding bulk nanoporous copper with ultralow density has been fabricated through dealloying of as-cast dual-phase Cu1Mn1Al8 alloy, and the dealloying behavior was investigated systematically. The experimental results show that due to different electrochemical activities, the Al11Cu5Mn3 phase of the dual-phase precursor alloy dissolved before AlCu2Mn, which corresponds to the dramatical evolutions of microstructure and composition. Additionally, a formation pattern based upon a mechanism combined “dissolution-redeposition” pattern, “phase-separation” pattern, and “coarsening” process has been built to describe the evolution process, which includes four stages, sequentially defined as “dissolution of Al11Cu5Mn3,” “redeposition of Cu atoms,” “dealloying of AlCu2Mn,” and “coarsening.”

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Acknowledgments

The authors would like to acknowledge funding from Ph.D. Programs Foundation of Ministry of Education of China (Grant No. 20110181110002). Also, we are grateful to Dr. W.B. Liu for useful discussions.

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  1. Department of Materials Science & Engineering, Sichuan University, Chengdu, 610065, People’s Republic of China

    Ying Tang, Ying Liu, Lixian Lian, Xuezhe Zhou & Lin He

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  1. Ying Tang
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Tang, Y., Liu, Y., Lian, L. et al. Formation of nanoporous copper through dealloying of dual-phase Cu-Mn-Al alloy: The evolution of microstructure and composition. Journal of Materials Research 27, 2771–2778 (2012). https://doi.org/10.1557/jmr.2012.307

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