铸造莫来石短纤维/Al-4.5Cu复合材料界面微结构的研究  

Study on the Interfacial Microstructure of Short Mullite Fibre Reinforced Al-4.5 Cu Composite

作　　者：张先菊[1] 廖乃馒[1] 李伟[1] 范洪远[1] 沈保罗[1] 

机构地区：[1]四川大学制造科学与工程学院,四川成都610065

出　　处：《铸造技术》2004年第9期716-718,共3页Foundry Technology

摘　　要：用挤压铸造方法制备Mullite/Al 4.5Cu复合材料。用透射电镜 (TEM )观察了淬火态及时效态复合材料的微观结构。结果表明 :莫来石 (Mullite)短纤维组织致密但分布不均 ;淬火态复合材料界面附近基体一侧存在高密度位错 ;Mullite/Al 4.5Cu复合材料有界面反应发生 ,生成CuAl2 O4;The short mullite fibre reinforced Al-4.5 Cu composite was produced by squeeze casting. The microstructure of quenching and aging composites has been studied by transmission electron microscope (TEM). It is shown that the crystal microstructure of short mullite fibre is compact but its distribution is not uniform. There are high density dislocations in the near vicinity of the quenched composite interface. In the fibre/matrix interface chemical reactions have taken place, resulting in the formation of CuAl_2O_4 and ( β -CuAlO_2).There also exists an obvious precipitate-free-zone in the interface of aging composite.

关 键 词：莫来石短纤维 铝基复合材料 界面微结构 

分 类 号：TB331[一般工业技术—材料科学与工程] TG136.1[金属学及工艺—合金]