In-Situ Electrochemical Processing of Light-Weight Alloys

一种直接加工轻质合金的新工艺， 使用低成本氧化锂作为锂的熔盐电解 来源将被调查。 的主要目标 研究是开发物理化学信息， 适用于铝锂合金的直接加工使用 在高强度、低密度结构的制造中。 具体而言，该研究将解决确定 以下基本信息：a）锂的溶解度 将测定氟化钙-氟化锂熔体中的氧化物 作为熔体组成和温度的函数。 B）阳极 钙电解过程中石墨上的过电压 将测量氟化物-氟化锂-氧化锂熔体。 阳极反应机理和极限电流密度区将 被评价。 c）将确定电解的效率。 温度、电解质组成、阳极和阴极的影响 电流密度、电极间距和阴极搅拌 将对效率进行评估。 铝锂合金的加工方法将是 价格便宜，使用低成本锂化合物进料，节约能源 通过在电解槽中直接生产铝锂合金， 电解槽

A new process for direct processing of light weight alloys by fused salt electrolysis using low cost lithium oxide as a lithium source will be investigated. The principal objective of the research is to develop physico-chemical information that can be applied to the direct processing of aluminum-lithium alloys for use in the manufacture of high strength, low density structures. Specifically, the research will address the determination of the following fundamental information: a) The solubility of lithium oxide in calcium fluoride-lithium fluoride melts will be determined as a function of melt composition and temperature. b) The anodic overvoltage on graphite during the electrolysis of calcium fluoride-lithium fluoride-lithium oxide melts will be measured. Anode reaction mechanism and limiting current density region will be evaluated. c) Efficiency of electrolysis will be determined. Effect of temperature, electrolyte composition, anode and cathode current densities, electrode spacing and stirring of the cathode pool on efficiency will be evaluated. The method for processing of aluminum-lithium alloys will be less expensive, use low cost lithium compound feed and save energy by directly producing aluminum-lithium alloys within the electrolytic cell.