HPT制备高含量SiC颗粒增强Al基复合材料的性能和致密化行为  

Properties and Densification Behavior of High Content of SiC Particles Reinforced Al-based Composites Prepared by HPT

作　　者：马俊林[1] 李萍[1] 徐杰[1] 田野[1] 薛克敏[1] 

机构地区：[1]合肥工业大学材料科学与工程学院,安徽合肥230009

出　　处：《稀有金属与硬质合金》2015年第5期58-63,共6页Rare Metals and Cemented Carbides

基　　金：国家自然科学基金资助项目(51175138);教育部新世纪优秀人才支持计划项目(NCET-13-0765)

摘　　要：采用高压扭转法制备了SiCP/Al基复合材料,分析了不同SiC体积分数复合材料的显微组织、硬度、相对密度及SiC颗粒分布的变化情况,并探讨了SiCP/Al基复合材料在高压扭转变形过程中的致密化机理。结果表明:随着SiC体积分数的增加,复合材料的相对密度不断减小,硬度和SiC颗粒的分布均匀程度均先增大后减小,且硬度沿试样径向呈递增趋势。同时,随着SiC体积分数的增大,SiC颗粒破碎和团聚现象也更为严重。SiCP/Al composites were prepared by high pressure torsion(HPT).Changes were analyzed of microstructure,hardness,relative density and SiC particle distribution of the composites with different SiC volume fraction.Densification mechanism was discussed of the composites during high pressure torsion formation.The results show that with the increasing SiC volume fraction,relative density of the composite continually decreases,while both hardness and uniformity of SiC distribution increase firstly and then decrease.And its hardness progressively increases along the radial direction of the sample.With SiC volume fraction increasing,the phenomenon of SiC particle breakage and reunification is more serious.

关 键 词：SICP/AL基复合材料 高压扭转 SiC体积分数 硬度 SiC颗粒分布 致密化 

分 类 号：TB333[一般工业技术—材料科学与工程]