Nucleation and growth of nanoporous copper ligaments during electrochemical dealloying of Mg-based metallic glasses

被引：105

作者：

Luo, Xuekun ^{[1
]}

Li, Ran ^{[1
]}

Huang, Lu ^{[1
]}

Zhang, Tao ^{[1
]}

机构：

[1] Beihang Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Aerosp Mat & Performance, Beijing 100191, Peoples R China

来源：

CORROSION SCIENCE | 2013年 / 67卷

基金：

北京市自然科学基金;

关键词：

Alloy; Copper; Amorphous structures; De-alloying; Interfaces; THIN-FILMS; GOLD; ALLOYS; ARRAYS; AU; AG; CU; FABRICATION; MECHANISM; EVOLUTION;

D O I：

10.1016/j.corsci.2012.10.010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Mg90-xCuxY10 glassy precursors have been used to synthesize nanoporous copper (NPC) by electrochemical dealloying in H2SO4 aqueous solution. The formation mechanism of NPC during electrochemical dealloying of Mg90-xCuxY10 metallic glasses is mainly governed by dissolution and diffusion processes at the precursor/solution interfaces. A diffusion growth model was provided to reveal a quantitative relationship between the ligament size and the dealloying conditions. The ligament size of NPC shows a linear correlation with Cu content in the glassy precursors. Moreover, the ligaments can be significantly coarsened with prolongation of leaching time or elevation of leaching temperature. (c) 2012 Elsevier Ltd. All rights reserved.

引用

页码：100 / 108

页数：9

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