摘要
为探讨不同尺度SiCp对SiCp/Al复合材料力学性能的影响,对亚微米和微米SiCp增强Al基复合材料的抗拉和抗压等力学性能进行研究.结果表明:SiCp/Al复合材料具有良好的塑性,伸长率随SiCp体积分数和尺寸的增加而减小;其抗拉强度和抗压强度随SiCp体积分数的增加而增加.亚微米SiCp/Al的拉伸和压缩性能均优于微米SiCp/Al.亚微米SiCp/Al复合材料的断裂机制为SiCp/Al界面处空洞的形成及其在基体内扩展.微米SiCp/Al存在SiCp的解理断裂及其沿基体扩展的复合过程.
The tensile and pressure properties of sub-micro and micrometer SiCp reinforced Al matrix composites were investigated to study the effect of SiCp in different scale on the mechanical properties. The results show that SiCp/Al matrix composites exhibit excellent plasticity, and the elongation percentage descends with the increase of the volume fraction of SiCp. Its tensile and compressive strength increase with the augment of the volume fraction. The tensile strength and compressive strength of sub-micrometer SiCp/Al are better than those of micrometer SiCp/Al. The rupture mechanism of sub-micrometer SiCp/Al is that the vacancy zone forms at interface of SiCp/Al and expands in the substrate. The rupture mechanism of micrometer SiCp/Al is the cleavage fracture of SiCp and its expanding in the substrate.
出处
《江苏大学学报（自然科学版）》
EI
CAS
北大核心
2008年第6期494-497,共4页
Journal of Jiangsu University：Natural Science Edition
基金
江苏省高校自然科学研究基金资助项目(03KJD460165)
关键词
亚微米
微米
复合材料
抗拉强度
抗压强度
sub-micrometer
micrometer
composites materials
tensile strength
compressive strength
