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。
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.
出处
《热加工工艺》
CSCD
北大核心
2011年第6期75-77,共3页
Hot Working Technology
基金
国家自然科学基金资助项目(406730500)
关键词
莫来石短纤维
铝基复合材料
界面组织
short mullite fiber
aluminium matrix composite
interfacial microstructure
