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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.

SUBMITTER: Zhang R

PROVIDER: S-EPMC9078667 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature

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Structure analysis of precursor alloy and diffusion during dealloying of Ag-Al alloy.

Zhang Runwei R Wang Xu X Zhang Zhichao Z Huang Jacob C JC Shi Feng F Wu Ming M

RSC advances 20180201 17

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 <i>via</i> focused ion beam (FIB) technique. We concluded that with the increase in A ...[more]

PMID: 35541846

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