本文關(guān)鍵詞： 納米多孔銅結(jié)構(gòu) 去合金化 電化學(xué)法 Cu-Zn合金　出處：《華中科技大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：傳統(tǒng)的脫合金法制備納米多孔金屬需要將合金制備與去合金化過程分開進(jìn)行,工藝復(fù)雜,但是電化學(xué)法制備納米多孔銅則可以將原有的熱處理過程在電鍍的同時(shí)進(jìn)行,不但減少了工藝的流程,而且提高了工藝的效率。本文選擇Cu-Zn合金并采用電化學(xué)法直接制備納米多孔銅。采用XRF、SEM分析樣品成分和微觀結(jié)構(gòu),研究了在恒電位條件下溫度與循環(huán)次數(shù)對納米多孔銅結(jié)構(gòu)的影響。具體研究內(nèi)容包括以下幾個(gè)方面:1.設(shè)計(jì)了簡單的電化學(xué)去合金化方法制備納米多孔銅,主要過程是電沉積鋅,然后進(jìn)行熱處理得到銅鋅合金,最后通過電化學(xué)去合金化方法溶出鋅組分而得到納米多孔銅。實(shí)驗(yàn)結(jié)果表明:在溫度為120℃,電壓-0.4V~1.0V條件下,經(jīng)過25次循環(huán)后可以得到有序的納米多孔銅結(jié)構(gòu)。2.研究溫度對納米多孔銅結(jié)構(gòu)的影響。研究表明,當(dāng)溫度低于120℃時(shí),銅和鋅之間難以形成合金化,不能制備出納米多孔銅結(jié)構(gòu);當(dāng)溫度達(dá)到120℃后,才能得到納米多孔結(jié)構(gòu)。隨著溫度升高,納米多孔銅結(jié)構(gòu)的孔徑尺寸逐漸減小并趨于穩(wěn)定。研究表明在120℃~150℃溫度范圍內(nèi)均能得到納米多孔銅結(jié)構(gòu)。3.研究了循環(huán)次數(shù)對納米多孔銅成分和形貌的影響。研究表明,當(dāng)循環(huán)次數(shù)低于25次時(shí),形成的銅鋅合金不穩(wěn)定,去合金化后未能得到納米多孔結(jié)構(gòu);而當(dāng)循環(huán)次數(shù)達(dá)到25次后,才能得到有序的納米多孔銅結(jié)構(gòu);隨著循環(huán)次數(shù)增加,納米多孔結(jié)構(gòu)的韌帶尺寸逐漸增大。分析表明在循環(huán)次數(shù)為25-30次時(shí)均能得到納米多孔結(jié)構(gòu)。
[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，

本文編號(hào)：1474788