4.7 Article

Dual-phase nanostructuring as a route to flexible nanoporous metals with outstanding comprehensive mechanical properties

期刊

SCIENCE CHINA-MATERIALS
卷 64, 期 9, 页码 2289-2304

出版社

SCIENCE PRESS
DOI: 10.1007/s40843-020-1606-4

关键词

nanoporous metals; metallic glass; mechanical properties; nanoindentation; flexible electrodes

资金

  1. National Natural Science Foundation of China [51771131]
  2. Recruitment Program of Global Experts 1000 Talents Plan of China [WQ20121200052]

向作者/读者索取更多资源

The NP Cu@Zr-Cu-Al MG composite with high strength, high hardness, and good flexibility was synthesized by a two-step dealloying method, demonstrating the highest tensile strength and nanohardness among all reported NPMs.
The mechanical properties of nanoporous metals (NPMs) are very important for their potential applications in flexible electronics. Here, the NP Cu@Zr-Cu-Al metallic glass (NP Cu@Zr-Cu-Al MG) composite with high strength, high hardness, and good flexibility is reported. The NP Cu@Zr-Cu-Al MG was synthesized by a two-step dealloying method. First, the flexible NP Zr-Cu-Al MG was prepared by selective etching the active Y-rich MG from the pseudobinary MG system (Zr47Cu46Al7 MG + Y47Cu46Al7 MG) of Cu46Zr23.5-Y23.5Al7 alloy. The NP Cu@Zr-Cu-Al MG was then obtained by further etching the NP Zr-Cu-Al MG and the Cu layer was evenly covered on the MG matrix of ligaments. The NP Cu@Zr-Cu-Al MG demonstrated good flexibility due to its non-cracking structure and the existence of flexible Zr-Cu-Al MG. Additionally, the NP Cu@Zr-Cu-Al MG showed the highest tensile strength of 143.9 MPa and nanohardness of 0.79 GPa among all the reported NPMs. The Zr-Cu-Al MG strengthening phase weakened the rupture of Cu@Zr-Cu-Al ligaments, which could effectively restrain the crack initiation and propagation in the NP Cu@Zr-Cu-Al MG. Finally, it could improve the comprehensive mechanical properties. The NP Cu@Zr-Cu-Al MG was applied as an electrode for supercapacitors and glucose biosensors. The NP Cu@Zr-Cu-Al MG electrode displayed better conductivity and supercapacitor capacitance than the bare NP Zr-Cu-Al MG electrode.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据