电化学法直接制备纳米多孔铜结构研究

发布时间：2018-01-30 00:34

  本文关键词： 纳米多孔铜结构 去合金化 电化学法 Cu-Zn合金　出处：《华中科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：传统的脱合金法制备纳米多孔金属需要将合金制备与去合金化过程分开进行,工艺复杂,但是电化学法制备纳米多孔铜则可以将原有的热处理过程在电镀的同时进行,不但减少了工艺的流程,而且提高了工艺的效率。本文选择Cu-Zn合金并采用电化学法直接制备纳米多孔铜。采用XRF、SEM分析样品成分和微观结构,研究了在恒电位条件下温度与循环次数对纳米多孔铜结构的影响。具体研究内容包括以下几个方面:1.设计了简单的电化学去合金化方法制备纳米多孔铜,主要过程是电沉积锌,然后进行热处理得到铜锌合金,最后通过电化学去合金化方法溶出锌组分而得到纳米多孔铜。实验结果表明:在温度为120℃,电压-0.4V~1.0V条件下,经过25次循环后可以得到有序的纳米多孔铜结构。2.研究温度对纳米多孔铜结构的影响。研究表明,当温度低于120℃时,铜和锌之间难以形成合金化,不能制备出纳米多孔铜结构;当温度达到120℃后,才能得到纳米多孔结构。随着温度升高,纳米多孔铜结构的孔径尺寸逐渐减小并趋于稳定。研究表明在120℃~150℃温度范围内均能得到纳米多孔铜结构。3.研究了循环次数对纳米多孔铜成分和形貌的影响。研究表明,当循环次数低于25次时,形成的铜锌合金不稳定,去合金化后未能得到纳米多孔结构;而当循环次数达到25次后,才能得到有序的纳米多孔铜结构;随着循环次数增加,纳米多孔结构的韧带尺寸逐渐增大。分析表明在循环次数为25-30次时均能得到纳米多孔结构。
[Abstract]:The traditional dealloying method for the preparation of nano-porous metals needs to separate the alloy preparation from the de-alloying process, and the process is complex. However, electrochemical preparation of nano-porous copper can be the original process of heat treatment at the same time, not only reduce the technological process. In this paper, Cu-Zn alloy was selected to prepare nano-porous copper directly by electrochemical method. The composition and microstructure of the samples were analyzed by XRF SEM. The effects of temperature and cycle times on the structure of nano-porous copper under constant potential were studied. The specific research contents include the following aspects: 1. A simple electrochemical dealloying method was designed to prepare nano-porous copper. The main process is electrodeposition of zinc and then heat treatment to obtain copper-zinc alloy. Finally, nano-porous copper can be obtained by electrochemical dealloying method. The experimental results show that the temperature is 120 鈩，

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