2090铝锂合金中稀土铈微合金化作用分析  

Analysis of the Micro-alloying Effect of Cerium Additions to the Al-Li Alloy 2090

作　　者：赵志龙[1] 张海南[1] 刘林[1] 陈铮[1] 

机构地区：[1]西北工业大学,西安710072

出　　处：《稀有金属材料与工程》2000年第5期304-306,共3页Rare Metal Materials and Engineering

基　　金：西北工业大学双新计划资助项目

摘　　要：利用弹性理论分析了稀土原子铈 (Ce)与 2 0 90铝锂合金中其它溶质原子 (Cu和 L i)间的交互作用 ,并采用离子探针和透射电镜 (TEM )分析研究了微量 Ce的添加对 Cu和 L i结合能的影响以及富 Cu相 (T1 相 )形态的变化。研究结果表明 :Cu原子在 Ce原子周围的偏聚比 L i在 Ce原子周围的偏聚具有更低的弹性势能 ;微量 Ce的添加对 Cu的结合能产生较大影响 ,使 T1The interactions between atoms of cerium and other solute atoms (Cu, Li)in the aluminium lithium alloy 2090 have been analyzed on the basis of elasticity theory. The effect of minor cerium addition on the binding energies of copper and lithium, and the morphology of the T 1 phase (Cu rich) have been investigated using the ion probe and transmission electron microscopy (TEM). It was shown that the gathering of Cu atoms around the Ce atom has lower elastic potential energy, as compared with the gathering of Li atoms around Ce. Trace Ce has a strong influence on the binding energy of Cu atoms, such that T 1 phase has smaller aspect ratio.

关 键 词：铈 铝锂合金 弹性作用 结合能 T1相 微合金化 

分 类 号：TG146.21[一般工业技术—材料科学与工程]