SiO_2与液态Al反应生成Al_2O_3/Al复合材料的研究  

Al_2O_3/Al Composites Fabricated by the Reaction of SiO_2 Glass Powder with Molten Aluminum in Situ

作　　者：程晓敏[1] 陶应龙[1] 张联盟[1] 陈铁群[2] 

机构地区：[1]武汉理工大学 [2]华南理工大学

出　　处：《特种铸造及有色合金》2003年第4期8-9,共2页Special Casting & Nonferrous Alloys

基　　金：湖北省自然科学基金项目 ( 9152 0 2 2 4 0 54 )

摘　　要：采用SiO2 粉与液态Al反应制备Al2 O3 /Al复合材料 ,讨论了SiO2 的加入量、反应温度、反应时间对反应速度的影响 ,分析了不同反应温度和保温时间下生成复合材料的微观结构。试验证明 :当SiO2 含量较低时 ,SiO2 与Al发生完全反应 ,形成均匀Al2 O3 /Al复合层 ;当w(SiO2 )达一定量时 ,反应速度反而降低 ;保温时间为 6～ 8h,反应速度最快 。Al 2 O 3 /Al Si composites were fabricated by the reaction of SiO 2 glass powder with molten aluminum. Effects of SiO 2 addition, reaction temperature and time on reaction speed were investiga ted. The microstructure of the composites were observed at various reaction temp eratures and holding times. It was found that SiO 2 fully reacted with Al t o generate uniform Al 2 O 3 /Al compound layer with lower SiO 2 add ition while reaction speed decreased with higher SiO 2 addition. The fastes t reaction speed occurred at holding time for 6～8 h, subsquently decreased. Com pound layer greatly increased with the increase in reaction temperature.

关 键 词：原位反应SiO2 AL2O3/AL复合材料 

分 类 号：TB331[一般工业技术—材料科学与工程]