原位Al_2O_3颗粒对近液相线铸造铝合金组织的影响  

Effect of In-situ Al_2O_3 Particles on Microstructure of Aluminum Alloy by Near-liquidus Casting

作　　者：格日乐[1] 刘慧敏[1,2] 张复懿[1] 由国艳[1] 

机构地区：[1]内蒙古工业大学材料科学与工程学院,内蒙古呼和浩特010051 [2]内蒙古工业大学内蒙古新材料工程技术中心,内蒙古呼和浩特010051

出　　处：《热加工工艺》2009年第7期10-13,共4页Hot Working Technology

基　　金：国家自然科学基金资助项目(50661003);内蒙古自然科学基金项目(200804042d17)

摘　　要：采用原位反应近液相线铸造法制备了Al2O3/Al-Cu复合材料,对其进行显微组织观察、XRD物相分析、TEM分析及自由能变化和绝热温度计算等。结果表明:加入的Al2O3颗粒对复合材料有细化和均匀化组织的作用,当颗粒含量达到5.3wt%时,得到均匀细小的蔷薇状组织;反应生成的Al2O3颗粒呈多边形且直径<1μm。The Al2O3 /Al-Cu composites were prepared by means of in-situ near-liquidus casting. The microstructure of the composites was observed by optical microscope, the XRD and TEM were employed to investigate the phase composition, the in-situ reaction was judged by the calculation of free energy and adiabatic temperature. The results show that the composites can be fined and homogenized by the Al2O3 particles; it can obtain the uniform microstructure of rose shape With 5.3% Al2O3 particles. The TEM analysis indicates that the in-site Al2O3 particle is polygon and diameter is smaller than 1 μm.

关 键 词：铝合金 原位Al2O3颗粒 近液相线铸造 

分 类 号：TG115.213.1[金属学及工艺—物理冶金]