冷却速度对Al_2O_3/Al-Si复合材料凝固组织的影响  

Effect of Different Cooling Rate on Solidification Microstructures of Alumina Short Fiber-Reinforced Al-Si Alloy Matrix Composite

作　　者：张朋娜[1] 刘政[1] 于兴哲[1] 

机构地区：[1]南方冶金学院材料与化学工程学院,江西赣州341000

出　　处：《轻合金加工技术》2004年第3期44-47,共4页Light Alloy Fabrication Technology

摘　　要：采用X射线衍射仪和扫描电镜分析Al2O3/Al-Si复合材料的凝固组织,发现界面处有Cu2Mg富集;Al-Si合金能很好地润湿Al2O3纤维,Al-Si合金与Al2O3纤维形成了共格、半共格混合界面;随着冷却速度的降低,界面偏析严重,没有界面产物。The solidification microstructures of Al2O3/Al-Si alloy matrix composite is examined by means of TEM and XRD,and it is found that there is accumulation of Cu2Mg at the interface.The analysis of tensile fracture shows that Al-Si alloy wets alumina fibers very well,and that coherent and semicoherent mixed interface is formed.With the decreasing of the cooling rate,the interface segregation become more graveness,but interface product is not found.

关 键 词：Al2O3/Al-Si 复合材料 凝固组织 冷却速度 X射线衍射仪 扫描电镜 

分 类 号：TB331[一般工业技术—材料科学与工程]