SiC颗粒增强铝合金基复合材料断裂与强化机理  

MECHANISMS ON FRACTURE AND STRENGTHENING OF ALUMINIUM ALLOY MATRIX COMPOSITES REINFORCED WITH SiC PARTICLES

作　　者：郭成[1] 程羽[1] 尚春阳[1] 苏文斌[1] 许建群[1] 

机构地区：[1]西安交通大学机械工程学院,西安710049

出　　处：《复合材料学报》2001年第4期54-57,共4页Acta Materiae Compositae Sinica

基　　金：西安交通大学在职博士基金资助 ( BS990 7)

摘　　要：对 Si C颗粒增强铝合金基复合材料的室温拉伸断裂与强化机理进行了研究。结果表明 :该类材料的断裂包括基体韧断、界面脱开和增强体颗粒断裂三种方式 ,均属于 MNG模式 ;该类复合材料的强化效果取决于基体强度与界面强度的匹配关系 ,当基体的屈服强度达到某一临界值时 。The mechanisms of tensile fracture and strengthening of aluminium alloy matrix composites reinforced with SiC particles are examined. The results show that fracture evolution entails a process of microvoid nucleation, growth, coalescence (MNG) for the PRMMCs and there exhibit three models of initial fracture in the process: toughness fracture of the matrix, boundary separation and particle break. Experimental analyses show that strengthening effect of the composites depends on the matching relations between the matrix and the boundary strength and it is very difficult to strengthen the composites when yield stress of the matrix goes beyound a certain critical value.

关 键 词：铝合金基复合材料 断裂 强化机制 碳化硅颗粒 颗粒增强 力学性能 

分 类 号：TB333[一般工业技术—材料科学与工程]