SiC颗粒增强铝合金基梯度复合材料弯曲力学性能及其评价.pdf

复 合材 料学报 19 6 12 2002 ACTA MATERIAE COMPOSIT AE SINICA　　　　　　　　　　　　　　Vol. 19No. 6 December 2002 : 1000-3851(2002) 06-0057-04 SiC 郭　成, 郭生武, 程　羽, 张新功, 史东才 ( , 710049) : , SiC , R 1 R 2 : ( MMGC) ROM , SiC ; , SiC , M MGC ; MM GC ; M MGC R 1 , R 2 : ; : 331: T B A BENDING MECHANICAL PROPERTIES AND ITS EVALUATION OF ALUMINIUM ALLOY MATRIX GRADIENT COMPOSITES REINFORCED WITH SiC PARTICLES , , , , GUO Cheng GU O Shengw CHENG Y ZHANG Xingong SHI Dongcai ( School of Mechanical Engineering, Xian Jiaoto g University , Xi an 710049) Abstract: The bending mechanical properties of al mini m alloy matrix gradient composites reinforced w it h SiC particles w ere st died sing a bending test nder three-point loading. T he bending strength ratios R 1 and R 2 of the composit es w ere p t forward. The res lts show that the bending mechanical properties of the Metal Matrix Gradi- ( ) ( ) . ent Composit es MMGC do not obey the Role of M ixt re ROM law T he bending strength is remarkably infl - enced by t he distrib t ion w ay of SiC particles and bending direct ion. T he MM GC can develop their f ll potential in bending properties w hen the matrix com ponent is laid at t he t ensile side and the component with high SiC vol me . fract ion at t he com pressive side The potential of mechanical properties and the oriented feat res of the M MGC by , - - the ac