Electrochemical Dealloying with Simultaneous Phase Separation
Electrochemical Dealloying with Simultaneous Phase Separation
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DOI：
10.1016/j.actamat.2019.03.039
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发表时间：
2018-11
期刊：
影响因子：
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通讯作者：
Yuqiao Zeng;B. Gaskey;Ellen Benn;I. McCue;G. Greenidge;K. Livi;Xuhai Zhang;Jianqing Jiang;Jonah Elebacher
中科院分区：
文献类型：
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作者：
Yuqiao Zeng;B. Gaskey;Ellen Benn;I. McCue;G. Greenidge;K. Livi;Xuhai Zhang;Jianqing Jiang;Jonah Elebacher
脱合金是一种选择性腐蚀过程，在此过程中，母合金中电化学活性较高的元素溶解，而剩余的贵重原子沿着固体-电解质界面扩散，从而形成由核-壳韧带组成的纳米孔微观结构。在这项工作中，我们研究了脱合金物理的扩展，其中母合金（cussingle - bond - fessingle - bond - dmn合金）包含一种选定的元素的工程组成，当其中一种元素溶解时，其余元素在未溶解的韧带中集中时相分离。这种同步的脱合金和相分离导致了含有纳米复合韧带的丰富多样的新型多孔结构的形成，以及由于溶液副作用导致的意想不到的结构演变，如纳米线的生长。
Dealloying is a selective corrosion process during which the more electrochemically active elements in a parent alloy dissolve while the remaining more noble atoms diffuse along the solid-electrolyte interface, resulting in the formation of a nanoporous microstructure composed of core-shell ligaments. In this work, we study an extension of the physics of dealloying in which the parent alloys (Cusingle bondFesingle bondMn alloys) contained an engineered composition of elements selected such that, upon dissolution of one of them, the remaining elements phase separate as they become concentrated in the undissolved ligaments. Such simultaneous dealloying and phase separation leads to the formation of rich variety of new porous structures containing nanocomposite ligaments, as well as unanticipated structure evolution such as nanowire growth that are attributed to solution side effects.