Mullite短纤维 /Al-Cu-Mg复合材料界面微结构研究
Study on Interfacial Microstructure of Short Mullite Fiber Reinforced Al-Cu-Mg Composite
张先菊1, 李 伟2
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作者单位：(1. 西南石油大学 材料科学与工程学院, 四川 成都 610500; 2. 电子科技大学 光电信息学院, 四川 成都 610054)
中文关键字：莫来石短纤维； 铝基复合材料； 界面组织
英文关键字：short mullite fiber; aluminium matrix composite; interfacial microstructure
中文摘要：研究用挤压铸造方法制备Mullite /Al-Cu-Mg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组织。结果表明，莫来石(Mullite)短纤维组织致密但分布不均；在淬火态复合材料纤维/基体界面和Si晶体/基体的界面附近基体一侧中发现存在高密度位错；Mullite/Al-Cu-Si复合材料的界面以非平衡共晶MgAl2O4沉淀相为主。
英文摘要：Short mullite fiber reinforced Al-Cu-Mg composite was prepared by squeeze casting. The microstructure of as cast and as-aged composite was studied by TEM. The results show that the crystal microstructure of short mullite fiber is compact but its distribution is uneven. Highly densified dislocation exists in the vicinity of the quenched composite interface. In the fiber/matrix interface, the chemical reactions take place, which result in the formation of MgAl2O4.