Influence of composition on dealloying of Mn-Cu alloys

被引：1

作者：

Yin S. ^{[1
,2
]}

Tan X. ^{[2
]}

Li K. ^{[2
]}

Luo J. ^{[2
]}

Jiang X. ^{[2
]}

Tang Y. ^{[2
]}

Hu W. ^{[1
]}

机构：

[1] School of Microelectronics and Solid-State Electronics, University of Electronic Science and Technology of China

[2] Research Center of Laser Fusion, CAEP, Mianyang 621900

来源：

Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | 2011年 / 23卷 / 05期

关键词：

Alloy composition; Arc melting; Dealloying; Micromorphology; Nanoporous copper;

D O I：

10.3788/HPLPB20112305.1250

中图分类号：

学科分类号：

摘要：

Nanoporous copper with bicontinuous ligament structures can be synthesized by free corrosion dealloying in dilute HCl solution with arc melted Mn-Cu alloys. The effect of initial alloy composition on micromorphology of nanoporous Cu and residual Mn atom fraction is investigated. The results indicate that, for alloys with Cu of more than 43% atom fraction, the dissolution of Mn is limited, leaving islands of retained Mn-Cu alloys. Bicontinuous ligament structures can be obtained as the initial Cu atom fraction decreases from 32% down to 23%. The ligaments of size from 20 to 100 nm and the nanopore of size from 30 to 80 nm can be tailored by controlling the initial alloy composition. However, the copper ligaments become large nanoparticles as the initial Cu atom fraction is below 20% and many cracks are observed after dealloying. A small amount of residual Mn exists in nanoporous copper and higher initial Mn atom fraction results in lower residual Mn atom fraction. The influence of acid concentration on the formation of nanoporosity is also investigated.

引用

页码：1250 / 1254

页数：4

共 20 条

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