Monolithic nanoporous copper by dealloying Mn-Cu
Monolithic nanoporous copper by dealloying Mn-Cu
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DOI：
10.1557/jmr.2006.0322
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发表时间：
2006-10-01
影响因子：
2.7
通讯作者：
Sieradzki, K.
中科院分区：
文献类型：
--
作者：
Hayes, J. R.;Hodge, A. M.;Sieradzki, K.
采用恒电位驱动脱合金和自由腐蚀两种不同的方法，通过Mn0.7Cu0.3的脱合金制备了整体纳米多孔铜。韧带的大小和形态被发现是高度依赖于脱合金的方法和条件。例如，从16 nm-125 nm的韧带分别通过电化学或自由腐蚀脱合金获得。初始Mn-Cu合金微观结构的优化使我们能够合成均匀的多孔结构;但我们发现开裂是不可避免的。尽管存在不可避免的缺陷，但多孔材料仍表现出高于预期的屈服强度。
Monolithic nanoporous copper was synthesized by dealloying Mn0.7Cu0.3 by two distinct methods: potentiostatically driven dealloying and free corrosion. Both the ligament size and morphology were found to be highly dependent on the dealloying methods and conditions. For example, ligaments from 16 nm-125 nm were obtained by dealloying either electrochemically or by free corrosion, respectively. Optimization of the starting Mn-Cu alloy microstructure allowed us to synthesize uniform porous structures; but we found cracking to be unavoidable. Despite the presence of unavoidable defects, the narroporous material still exhibits higher than expected yield strength.