Direct Research On Preparation Of Nano-porous Copper Using Electrochemical Method

The alloying and de-alloying process were separate in traditional dealloying method. Different from the traditional dealloying method, nano porous copper prepared by electrochemical method can be alloying, and change the electrode potential in the same conditions directly to dealloying at the same time. Not only reduces the process, but also improve the efficiency of the process.This paper select the Zn-Cu alloy and electrochemical preparation of nano porous copper, with XRF and SEM analysis of the compositions of the samples and the microstructure, studied under the condition of constant potential temperature and cycle times of nano porous copper the influence of pore structure and the formation mechanism of nano porous copper. The concrete research content is divided into the following several aspects:1. Design the simple alloy preparation of nano porous copper/electrochemical to alloying method, the main process is first electroplating a layer of zinc in copper electrode surface, and then through the form directly under the condition of high temperature heat treatment alloy layer, finally the method of using electrochemistry to alloying dissolution and porous copper zinc components. Through the experimental results show that:120?,-0.4V~1.0V conditions, after 25 cycles can be orderly nano porous copper structure.2. On the obtained nano porous structure, to study the effect of temperature on the porous structure. Proved by electrochemical polarization curve, when the temperature is below 120?, the copper zinc alloy is not completely alloying, forming porous structure, when the temperature reached 120?, can obtain the porous structure: with the increase of temperature, the structure of the nano porous copper aperture size decreases and tends to be stable, the analysis shows that nano porous copper structure is obtained in the range of 120?~150?.3. Research on different cycles on the nano porous copper the influence of the composition and morphology. Research shows that when the cyclic number is less than 25 times, formation of the alloy is not stable, or failed to get the nanoporous structure after alloying, when cycles of 25 times, can obtain the orderly nano porous structure; With the increase of cycling times, nano porous structure of the ligament size increases gradually, analysis shows that for 25 to 30 times in cycles can get the nano porous structure.