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

机译：Ag-Al合金探讨期间前体合金与扩散的结构分析

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摘要

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 alpha-Al(Ag) and gamma-Ag2Al phases, the as-dealloyed Ag35Al65 alloy exhibited a homogeneous ligament/pore structure, whereas the microstructures of Ag-30 Al-70 and Ag-40 Al-60 showed thinner and coarser ligament structures, respectively.
机译：通过释放具有30,35和40at以％Ag的标称组合物（分别对应于低分解组合物，共晶组合物和过度化组合物）来制造纳米孔银（NPS）制造纳米孔银（NPS）。 使用扫描电子显微镜（SEM）和透射电子显微镜（TEM）以及通过聚焦离子束（FIB）技术观察Ag-Al前体和低于造放样品的微观结构。 我们得出结论，随着30至40％的Ag含量增加，韧带的直径增加到70 +/- 15nm至115 +/- 35nm。 由于晶体凝固的方法和α-Al（Ag）和γ-Ag2Al阶段的分布，AS-脱氧型Ag35A65合金表现出均匀的韧带/孔结构，而Ag-30 Al-70和Ag的微观结构 40 Al-60分别显示出较薄和较粗的韧带结构。

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  • 来源
    《RSC Advances》 |2018年第17期|共9页
  • 作者

    Zhang Runwei; Wang Xu; Zhang Zhichao; Huang Jacob C.; Shi Feng; Wu Ming;

  • 作者单位

    Liaoning Shihua Univ Sch Mech Engn Fushun 113001 Peoples R China;

    Liaoning Shihua Univ Sch Mech Engn Fushun 113001 Peoples R China;

    Liaoning Shihua Univ Sch Mech Engn Fushun 113001 Peoples R China;

    City Univ Hong Kong Dept Mat Sci &

    Engn Inst Adv Study Kowloon Hong Kong Peoples R China;

    Liaoning Shihua Univ Sch Mech Engn Fushun 113001 Peoples R China;

    Liaoning Shihua Univ Sch Mech Engn Fushun 113001 Peoples R China;

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