熔盐电解法制备Al-Cu中间合金  

Preparation of Al-Cu intermediate alloy by molten-salt electrolytic

作　　者：廖春发[1] 罗林生[1] 王旭[1] 

机构地区：[1]江西理工大学冶金与化学工程学院,江西赣州341000

出　　处：《有色金属科学与工程》2015年第3期1-5,共5页Nonferrous Metals Science and Engineering

基　　金：国家自然科学基金资助项目（51074081）

摘　　要：以Na3Al F6-Al F3-Mg F2-Li F为电解质,Al2O3、Cu O为原料,对熔盐电解共沉积制备Al-Cu中间合金进行了研究,采用扫描电子显微镜（SEM）、能谱（EDS）及X射线衍射（XRD）分析合金表面形貌及元素分布.结果表明：施加外电压为2.6-3.5 V时,合金形成速率随电压的增加先增加后降低,施加外电压为3.3 V时,合金形成速率可达最大值;温度为895-955℃时,合金的形成速率随温度升高先增加后降低,温度为935℃时可达最大值;恒压3.3 V,温度为935℃,可制得Cu质量分数为11.51%、纯度为97.2%的Al-Cu合金,且合金中的铜与铝合金化过程中主要是以环状的Al2Cu相分布在晶界上;XRD分析表明合金中Cu主要是以Al2Cu相存在于合金组织中.Using Na3 Al F6-Al F3-Mg F2-Li F as electrolyte and Al2O3,Cu O as raw materials, Al-Cu intermediate alloy prepared by molten-salt electrolytic codeposition was studied. Alloy morphologies and elemental distributions were analyzed by SEM, EDS and XRD. The results show that the alloy formation rate increases first and then decreases at the applied outer voltage of 2.6 -3.5 V with increasing voltage. Its rate reaches a maximum value at 3.3 V. With increasing temperature, the alloy formation rate increases first and then decreases at 895-955 ℃; the formation rate reaches the maximum value at 935 ℃. The mass fraction of Cu in the alloy is about 11.51 wt.%,with Al-Cu alloy purity of 97.2% at the constant voltage of 3.3 V at 935 ℃.Copper and aluminum alloys are distributed as ringed Al2 Cu phase along the gran boundaries during the alloying process. X-ray diffraction（XRD） analysis shows that Cu mainly exists in the form of Al2 Cu phase.

关 键 词：Al-Cu中间合金 熔盐电解 氧化铜 形成速率 

分 类 号：TF111.52[冶金工程—冶金物理化学]