Effect of Ce on morphology of a(Al)-Al_2Cu eutectic in Al-Si-Cu alloy

作     者：Maja VONCINA Jozef MEDVED Tonica BONCINA Franc ZUPANIC 

作者机构：Department for Materials and MetallurgyFaculty of Natural Science and EngineeringUniversity of LjubljanaAskerceva 12SI-1000 LjubljanaSlovenia University of MariborFaculty of Mechanical EngineeringSmetanova 17SI-2000 MariborSlovenia 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2014年第24卷第1期

页      面：36-41页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

主　　题：Ce Al-Si-Cu alloy cerium eutectic microstructure focused ion beam 

摘      要：The effect of Ce addition on the morphology of the α（Al）-Al2Cu eutectic in Al-Si-Cu alloy was investigated using thermal analysis, light microscopy, scanning electron microscopy, focused ion beam and energy dispersive analysis. The results show that the eutectic α（Al）-Al2Cu forms within small space between dendrites, silicon and AlSiFeMn plates. Eutectic Al2Cu is not lamellar but degenerated. However, Al2Cu in Ce-modified alloys is more compact. Ce partially dissolves in Al2Cu, which is a viable reason for the formation of coarser Al2Cu. The addition of Ce also increases the microhardness of theα（Al）-Al2Cu eutectic by almost 10%compared with the basic Al-Si-Cu alloy.