Al/Al_2O_3陶瓷基复合材料的研究进展  

Progress in Research on Al/Al_2O_3 Ceramic Matrix Composites

作　　者：周正[1] 张力[1] 丁培道[1] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400044

出　　处：《材料导报》2000年第6期64-66,共3页Materials Reports

摘　　要：在综述Al/Al_2O_3复合材料制备工艺的基础上,提出了将石英玻璃浸入铝熔体中,通过Al向SiO_2玻璃中的反应浸渗,制备Al/Al_2O_3复合材料的新方法。获得了Al与Al_2O_3相互连通的Al/Al_2O_3复合材料。由于玻璃具有容易被加工成各种形状零件的特点,通过Al液向致密玻璃坯体的反应浸渗,可以获得近成形的Al/Al_2O_3复合材料。实验结果发现,由于Al/AlO_3中不存在孔隙,Al/AlO_3的弯曲强度和断裂韧性分别可达430MPa和13MPa·m^(1/2),其性能优于用Lanxide工艺制备的Al/Al_2O_3。The article reviews the techniques of fabricating Al/AlO3 ceramic matrix composites and describes a new process which involves aluminum reactive penetration when silica glass is soaked into aluminum melts,producing mutually interpenetrating alumina-aluminum composites. Because silica glass can be easily formed into various shapes, Al/Al2O3 composite can be made to near-net-shape by reactive penetration of dense glass preforms by molten aluminum. Because there is no porosity in the Al/Al2O3 composites ,Al/Al2O3 composites have a bend stre(?)gth of 430 MPa and a fracture toughness of 13 MPa·m1/2 that are higher than Lanxide's.

关 键 词：AL/AL2O3复合材料 制备工艺 性能 

分 类 号：TB332[一般工业技术—材料科学与工程]