(1. 东南大学 机械工程系， 南京 210096；
2. 江苏理工大学 材料科学与工程学院， 镇江 212013)
摘 要: 从Al-ZrOCl2体系利用熔体直接反应法制备了原位ZrAl3和Al2O3颗粒增强铝基复合材料。Al-Zr-O体系中原位形成的ZrAl3具有四方结构，其最大尺寸为4 μm，纵横长度比小于2.0。此外，还有一定数量的亚微米级Al2O3颗粒生成，其晶体为六方结构，纵横长度比大于2.0。ZrAl3(p)，Al2O3(p)/Al复合材料凝固组织中，随ZrOCl2加入量的增加，生成的颗粒尺寸更小，分布更均匀。拉伸试验表明：Al-ZrOCl2体系制备的复合材料具有高的强度和塑性，断口组织中存在大量韧窝，韧窝中镶嵌着细小颗粒，属韧性断裂。
关键字: 铝基复合材料； ZrOCl2； ZrAl3； Al2O3
reaction in system Al-ZrOCl2
（1. Department of Mechanical Engineering，
Southeast University， Nanjing 210096, P.R.China;
2. School of Materials Science and Engineering，Jiangsu University of Science and Technology，Zhenjiang 212013, P.R.China）
Abstract:In-situ ZrAl3 and Al2O3 particulates reinforced aluminum composites were fabricated by the direct melt reaction (DMR) method from Al-ZrOCl2 system. In-situ ZrAl3 particulates with a tetragonal structure， a length/width ratio lower than 2.0 and a maximum size of 4 μm were formed in the system Al-Zr-O. In addition， a certain number of submicron Al2O3 particles with a hexagonal structure and a length/width ratio larger than 2.0 were also generated in this system. In the microstructure of ZrAl3(p)+Al2O3(p)/Al composite， in-situ formed particulates are finer and welldistributed with the increasing of ZrOCl2 addition. Tensile tests indicate that composites fabricated by the system Al-ZrOCl2 exhibite high strength and ductility. There are a lot of ripples with fine particulates on the fracture. The fracture of (ZrAl3+Al2O3)p/Al composites belongs with toughness.
Key words: Al matrix composite； ZrOCl2； ZrAl3； Al2O3
