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Fabrication of nanoporous silver by de-alloying Cu-Zr-Ag amorphous alloys

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Abstract

Nanoporous silver (NPS) with a ligament size ranging from 15 to 40 nm was fabricated by de-alloying (Cu50Zr50)100-x Ag x (x = 10at%, 20at%, 30at%, and 40at%) amorphous ribbons in a mixed aqueous solution of hydrofluoric (HF) acid and nitric acid under free corrosion conditions. Nanoporous silver ligaments and pore sizes were able to be fine-tuned through tailoring the chemical composition, corrosion conditions, and de-alloying time. The ligament size increases with an increase in Ag content and de-alloying time, but decreases with an increase in HF concentration. This phenomenon may be attributed to the dissolution of Zr/Cu and the diffusion, aggregation, nucleation, and recrystallization of Ag, leading to an oriented attachment of adjacent nanocrystals as revealed by TEM analysis.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Beihang University, Beijing, 100191, China

    Hui Wang, Shang-gang Xiao & Tao Zhang

  2. Key Laboratory of Aerospace Materials and Performance (Ministry of Education), Beihang University, Beijing, 100191, China

    Hui Wang, Shang-gang Xiao & Tao Zhang

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  1. Hui Wang
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  2. Shang-gang Xiao
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  3. Tao Zhang
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Correspondence to Hui Wang.

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Wang, H., Xiao, Sg. & Zhang, T. Fabrication of nanoporous silver by de-alloying Cu-Zr-Ag amorphous alloys. Int J Miner Metall Mater 23, 835–843 (2016). https://doi.org/10.1007/s12613-016-1298-9

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  • DOI: https://doi.org/10.1007/s12613-016-1298-9

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