Preparation of hierarchical porous metals by two-step liquid metal dealloying
Preparation of hierarchical porous metals by two-step liquid metal dealloying
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DOI：
10.1016/j.scriptamat.2017.08.038
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发表时间：
2018-01-01
影响因子：
6
通讯作者：
Kato, Hidemi
中科院分区：
文献类型：
--
作者：
Wada, Takeshi;Geslin, Pierre-Antoine;Kato, Hidemi
使用含有两种可溶组分和两种金属浴的合金前体，通过两步液态金属脱合金制备了分级多孔金属。在第一个脱合金步骤之后，一种可溶成分溶解并形成粗孔结构。在另一种熔体中进行较短的脱合金步骤后，另一种可溶成分被溶解，并在先前形成的粗韧带内形成精细的多孔结构。所得多孔金属呈现出具有双峰孔分布的分级形态，与一步脱合金方法相比，具有更高的孔隙率和表面积与体积比。 (C) 2017 Acta Materialia Inc. 由 Elsevier Ltd 出版。保留所有权利。
A hierarchical porous metal has been prepared by two-step liquid metal dealloying using an alloy precursor containing two soluble components and two metal baths. After the first dealloying step, one of the soluble components is dissolved and a coarse porous structure is formed. After a shorter dealloying step in another melt, the other soluble component is dissolved and a fine porous structure is formed within the previously formed coarse ligaments. The resultant porous metal presents a hierarchical morphology with a bimodal pore distribution, resulting in a higher porosity and surface-area-to-volume ratio than what can be formed by one-step dealloying methods. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.