A segmental dealloying for fabricating the gradient nanoporous metal materials

作者：Lian, Lixian; Yao, Yanfei; Liu, Ying^*; Fang, Xiumei

来源：Journal of Porous Materials, 2017, 24(1): 211-215.

DOI：10.1007/s10934-016-0254-4

• Segmental dealloying
• Gradient nanoporous metal
• Nanoporous materials

Dealloying is a promising technique for preparing the functional nanoporous metals. Yet, this technique is mainly used for preparing nanoporous noblemetals, in which the pore sizes are randomly distributed. In this paper, a segmental dealloying method is proposed for fabricating the gradient nanoporous Cu (NPC) from the Cu-Mn alloy. The main idea in this new method is that the different segments of a sample are respectively dealloyed under different corrosion temperature, so as to obtain the gradient pore sizes in the nanoporous metals. The experimental results illustrate that the pore sizes of NPC increase along one direction with the elevated corrosion temperature. Meanwhile, the 3-D connected network structure with gradient-distributed pores in NPC is generated in this experiment. To our best knowledge, the segmental dealloying method can be extended to fabricate some other gradient nanoporous metals, such as Au, Ag, Pd, Pt, and so on.

• 出版日期2017-2
• 单位四川大学