Issue 17, 2018, Issue in Progress

Structure analysis of precursor alloy and diffusion during dealloying of Ag–Al alloy

Abstract

Nanoporous silver (NPS) was fabricated by dealloying Ag–Al alloy ribbons with nominal compositions of 30, 35 and 40 at% Ag (corresponding to hypoeutectic composition, eutectic composition and hypereutectic composition, respectively). The microstructures of the Ag–Al precursor and as-dealloyed samples were observed using a scanning electron microscope (SEM) and a transmission electron microscope (TEM) as well as via focused ion beam (FIB) technique. We concluded that with the increase in Ag content from 30 to 40 at%, the diameter of ligament increased from 70 ± 15 nm to 115 ± 35 nm. Due to the method of crystalline solidification and the distribution of α-Al(Ag) and γ-Ag2Al phases, the as-dealloyed Ag35Al65 alloy exhibited a homogeneous ligament/pore structure, whereas the microstructures of Ag30Al70 and Ag40Al60 showed thinner and coarser ligament structures, respectively.

Graphical abstract: Structure analysis of precursor alloy and diffusion during dealloying of Ag–Al alloy

Supplementary files

Article information

Article type
Paper
Submitted
30 Nov 2017
Accepted
20 Feb 2018
First published
05 Mar 2018
This article is Open Access
Creative Commons BY license

RSC Adv., 2018,8, 9462-9470

Structure analysis of precursor alloy and diffusion during dealloying of Ag–Al alloy

R. Zhang, X. Wang, Z. Zhang, J. C. Huang, F. Shi and M. Wu, RSC Adv., 2018, 8, 9462 DOI: 10.1039/C7RA12915G

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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