脉冲电场对Al-10%Cu熔体活度的影响  

Effects of Pulse Electric Field on Al-10%Cu Melt Activity

作　　者：张震斌[1] 王建中[2] 齐锦刚[2] 王冰[1] 何力佳[1] 苍大强[1] 

机构地区：[1]北京科技大学,北京100083 [2]辽宁工业大学,辽宁锦州121001

出　　处：《材料科学与工程学报》2008年第4期647-649,653,共4页Journal of Materials Science and Engineering

基　　金：国家自然科学基金资助项目(50674054);辽宁省高校重点实验室开放课题资助项目(200516203)

摘　　要：采用分配系数法,以Pb-10%Cu熔体为平衡相,结合Miedema生成热模型,考察了电脉冲作用前后Al-10%Cu熔体Cu组元活度的变化。研究表明,脉冲电场作用下,体系溶质Cu的分配系数由0.2876变为1.6541,Pb-10%Cu合金中Cu原子有向上部Al-10%Cu熔体扩散的倾向。计算结果表明,分配体系下部Pb-Cu合金中溶质Cu的活度由原来的0.1143变为0.0385,基于溶质Cu在体系上下部活度相等的事实,得出上部Al-Cu熔体溶质Cu的活度变化。Taking Pb-10%Cu melt as the equilibrium phase, the activity of Cu in Al-10%Cu melt under the pulse electric field （PEF） is investigated by the distribution coefficient method and the Miedema heat formation model. The results show that solute distribution coefficient of Cu in system has changed from 1. 6541 to 0. 2876, the atom of Cu in Pb-10%Cu melt has the tendency to migrate into Al-10%Cu melt under the PEF. The activity of Cu in Pb-Cu alloy has changed from 0. 1143 to 0. 0385. The acitvity of Cu in Al-Cu melt is obtained based on the fact that both the upper layer＇s Al-Cu melt and the bottom layer＇s Pb-Cu melt have the same activity.

关 键 词：铝铜熔体 分配系数 MIEDEMA模型 活度 电脉冲 

分 类 号：O64[理学—物理化学] TG146.21[理学—化学]