氧化铝基陶瓷复合材料的微观结构与增韧机理  

Microstructures and Toughening Mechanisms of Alumina-Matrix Composites

作　　者：周洋[1] 詹国栋[2] 徐明英[3] 张以增 

机构地区：[1]北京航空材料研究院先进复合材料国防科技重点实验室,北京100095 [2]中国科学院上海硅酸盐研究所,上海200050 [3]华中理大学材料系,武汉430074

出　　处：《无机材料学报》1997年第2期161-168,共8页Journal of Inorganic Materials

基　　金：中国博士后科学基金!中博基1995 1号

摘　　要：应用相交增韧、相变－晶须复合及相变－颗粒复合等方式对氧化铝陶瓷进行增韧．遇过各材料强韧性的测试、微观结构的分析以及断口形貌的对比，研究了各材料的断裂特点及不同增韧方式的增韧机理与效果，得出材料的强韧性与其断口形貌密切相关；双重增韧材料中，两种增韧方式不是简单的叠加，而是存在相互作用；同时在性能试验后的材料基体内观察到位借的存在．Various toughening methods, such as transformation toughening, transformation-whiskerreinforcement and transformation-particle reinforcement were used toimprove the mechanical properties of alumina.The fracture behaviors and toughening mechanisms of the composites werc studied by measuringmechanical properties, analyzing microstructures and comparing fracture morphologies. The mechanical propertiesof testing materials arc closely related with the morphologies of fracturc surfaces. The two tougheningmcchanisms in joint toughening composites will affect with each other, and produce an effect ofcooperative toughening on certain conditions. The dislocations were observed in matrix of meterials undergoingproperty test. The tearing ridges, which are created generally in ductile fracture, were also observed onfracture surface in ZTA material.

关 键 词：微观结构 韧性 陶瓷复合材料 氧化铝 

分 类 号：TQ174.758[化学工程—陶瓷工业]