The effect of thermal-mechanical processing on the microstructure and mechanical properties of the duplex phase Mg-8Li-3Al-0.4Y alloy was investigated.The as-cast alloy was composed ofα-Mg,β-Li,AlLi,Al2Y and MgAlLi2...The effect of thermal-mechanical processing on the microstructure and mechanical properties of the duplex phase Mg-8Li-3Al-0.4Y alloy was investigated.The as-cast alloy was composed ofα-Mg,β-Li,AlLi,Al2Y and MgAlLi2phases.Annealing of the cold rolled alloy at350°C for60min was considered to be optimum.This caused full static recrystallization and spheroidization.A significantβ-Li loss occurred when the annealing time was increased to90min.The optimized annealing treatment produced the following values of the yield strength,ultimate strength and elongation:148MPa,184MPa and35%,respectively.The texture evolution of theα-phase and theβ-phase changed remarkably during thermal-mechanical processing.展开更多
基金financially supported by the Anhui Province Innovative Engineering Project for New Energy Vehicles and Intelligent Connected Vehicles,China.the funding support from the Research Fund Program of State Key Laboratory of Rare Metals Separation and Comprehensive Utilization,China(No.GK-201806)。
文摘以淀粉为还原剂从废三元锂离子电池(LIBs)正极材料脱锂渣中回收Ni、Co和Mn,并研究其浸出动力学和机理。系统地研究搅拌速率、浸出温度、H_(2)SO_(4)浓度和淀粉用量对Ni、Co和Mn浸出率的影响。结果表明,在搅拌速率为500 r/min、硫酸浓度为1.5 mol/L、淀粉用量为6 g/L、浸出温度为80℃和浸出时间为60 min的优化条件下,Ni、Co和Mn的浸出率分别达到98.07%、96.52%和98.06%。根据冶金过程液固反应动力学模型,脱锂渣的浸出动力学可以用化学反应控制的未反应收缩核模型很好地进行描述。在浸出反应中,Ni、Co和Mn的表观反应活化能分别为93.32、102.84和95.68 k J/mol,H_(2)SO_(4)的表观反应级数分别为0.9225、1.0335和1.1285。淀粉容易制取、成本低,可取代传统还原剂用于从废三元锂电池中提取有价金属。
基金Project(51461018)supported by the National Natural Science Foundation of ChinaProjects(20133BAB20008,20144ACB20013)supported by the Key Program of Natural Science Foundation of Jiangxi Province,ChinaProject(20151BDH80006)supported by the International Science and Technology Cooperation Program of Jiangxi Province,China
文摘The effect of thermal-mechanical processing on the microstructure and mechanical properties of the duplex phase Mg-8Li-3Al-0.4Y alloy was investigated.The as-cast alloy was composed ofα-Mg,β-Li,AlLi,Al2Y and MgAlLi2phases.Annealing of the cold rolled alloy at350°C for60min was considered to be optimum.This caused full static recrystallization and spheroidization.A significantβ-Li loss occurred when the annealing time was increased to90min.The optimized annealing treatment produced the following values of the yield strength,ultimate strength and elongation:148MPa,184MPa and35%,respectively.The texture evolution of theα-phase and theβ-phase changed remarkably during thermal-mechanical processing.
