纳米SiC颗粒增强铝基复合材料的拉伸性能  

Tensile Properties of SiC Nanoparticle Reinforced Pure Aluminum Matrix Composites

作　　者：贺春林[1] 刘常升[1] 孙旭东[1] 才庆魁[2] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004 [2]沈阳大学材料科学与工程系,辽宁沈阳110044

出　　处：《东北大学学报（自然科学版）》2005年第6期554-557,共4页Journal of Northeastern University(Natural Science)

基　　金：教育部跨世纪优秀人才培养计划项目;国家自然科学基金资助项目(50474084);辽宁省科技计划项目(2004221010)

摘　　要：用粉末冶金法制备了纳米SiC颗粒增强纯Al基复合材料(AlMMCs),对该材料的微观结构和拉伸性能进行了研究·结果表明,纳米SiC颗粒在含量很少时即对Al有明显的强化作用,此时,纳米颗粒在基体中的分散比较均匀;当含量较高时则纳米颗粒易于团聚,团聚会使SiC颗粒对Al的强化作用降低·纳米SiC颗粒含量发生变化,SiCp/AlMMCs的断裂机制也有所改变·The SiC nanoparticle reinforced pure aluminum metal matrix composites (Al MMCs) were prepared through a powder metallurgy technique. Their microstructures and tensile properties were investigated. The results showed that SiC nanoparticles enhance the strength of pure aluminium significantly even if their content is very low, with the nanoparticles uniformly dispersed in the Al matrix. However, when the content becomes higher, the SiC nanoparticles are easily agglomerated to lower their strength enhancement effect on aluminum. The tensile fracture showed that the damage mechanism of the Al MMCs changes with the changing content of SiC nanoparticles.

关 键 词：AL 纳米SIC颗粒 金属基复合材料 结构 拉伸性能 

分 类 号：TB331[一般工业技术—材料科学与工程]