有色金属科学与工程
有色金屬科學與工程
유색금속과학여공정
JIANGXI NONFERROUS METALS
2015年
3期
1-5
,共5页
Al-Cu中间合金%熔盐电解%氧化铜%形成速率
Al-Cu中間閤金%鎔鹽電解%氧化銅%形成速率
Al-Cu중간합금%용염전해%양화동%형성속솔
Al-Cu intermediate alloy%molten-salt electrolytic%copper oxide%formation rate
以Na3AlF6-AlF3-MgF2-LiF为电解质,Al2O3、CuO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.
以Na3AlF6-AlF3-MgF2-LiF為電解質,Al2O3、CuO為原料,對鎔鹽電解共沉積製備Al-Cu中間閤金進行瞭研究,採用掃描電子顯微鏡(SEM)、能譜(EDS)及X射線衍射(XRD)分析閤金錶麵形貌及元素分佈.結果錶明:施加外電壓為2.6~3.5 V時,閤金形成速率隨電壓的增加先增加後降低,施加外電壓為3.3 V時,閤金形成速率可達最大值;溫度為895~955℃時,閤金的形成速率隨溫度升高先增加後降低,溫度為935℃時可達最大值;恆壓3.3 V,溫度為935℃,可製得Cu質量分數為11.51%、純度為97.2%的Al-Cu閤金,且閤金中的銅與鋁閤金化過程中主要是以環狀的Al2Cu相分佈在晶界上;XRD分析錶明閤金中Cu主要是以Al2Cu相存在于閤金組織中.
이Na3AlF6-AlF3-MgF2-LiF위전해질,Al2O3、CuO위원료,대용염전해공침적제비Al-Cu중간합금진행료연구,채용소묘전자현미경(SEM)、능보(EDS)급X사선연사(XRD)분석합금표면형모급원소분포.결과표명:시가외전압위2.6~3.5 V시,합금형성속솔수전압적증가선증가후강저,시가외전압위3.3 V시,합금형성속솔가체최대치;온도위895~955℃시,합금적형성속솔수온도승고선증가후강저,온도위935℃시가체최대치;항압3.3 V,온도위935℃,가제득Cu질량분수위11.51%、순도위97.2%적Al-Cu합금,차합금중적동여려합금화과정중주요시이배상적Al2Cu상분포재정계상;XRD분석표명합금중Cu주요시이Al2Cu상존재우합금조직중.
Using Na3AlF6-AlF3-MgF2-LiF as electrolyte and Al2O3,CuO 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 Al 2Cu phase along the gran boundaries during the alloying process. X-ray diffraction(XRD) analysis shows that Cu mainly exists in the form of Al2Cu phase.