Effect of Particle Size on the Microstructures and Mechanical Properties of SiC-Reinforced Pure Aluminum Composites
Effect of Particle Size on the Microstructures and Mechanical Properties of SiC-Reinforced Pure Aluminum Composites
复制标题
粒径对SiC增强纯铝复合材料显微组织和力学性能的影响
DOI：
10.1007/s11665-010-9801-3
复制
发表时间：
2011-12-01
影响因子：
2.3
通讯作者：
He, Yuehui
中科院分区：
文献类型：
--
作者：
Sun, Chao;Song, Min;He, Yuehui
研究了粉末冶金法制备的碳化硅颗粒增强纯铝复合材料的颗粒尺寸和挤压工艺对其组织和力学性能的影响。结果表明，颗粒尺寸和挤压工艺对复合材料的显微组织和力学性能均有重要影响。当基质粉末尺寸与碳化硅颗粒尺寸之比接近1时，碳化硅颗粒分布更均匀，尺寸较小的碳化硅颗粒更容易团聚。空洞与簇状、大尺寸的碳化硅颗粒共存，显著降低了复合材料的密度和力学性能。挤压可以使碳化硅颗粒在基体中重新分布，减少气孔数量，从而使碳化硅颗粒在基体中的分布更加均匀，从而提高界面结合强度。碳化硅颗粒尺寸的减小提高了复合材料的拉伸强度和屈服强度，但降低了复合材料的塑性。
This article examined the effects of particle size and extrusion on the microstructures and mechanical properties of SiC particle-reinforced pure aluminum composites produced by powder metallurgy method. It has been shown that both particle size and extrusion have important effects on the microstructures and mechanical properties of the composites. The SiC particles distribute more uniformly when the ratio of the matrix powder size and SiC particle size approaches unity, and the smaller-sized SiC particles tend to cluster easily. The voids are found to coexist with the clustered and large-sized SiC particles, and they significantly decrease the density and mechanical properties of the composites. Extrusion can redistribute the SiC particles in the matrix and decrease the number of pores, thus make the SiC particles distribute more uniformly in the matrix, and enhance the interfacial bonding strength. The decrease in the SiC particle size improves the tensile strength and yield strength, but decreases the ductility of the composites.