无压浸渗制备SiC_p/Al复合材料的微观组织及弯曲性能  

Microstructure and bending mechanical properties of high volume fraction SiC_p/Al composites

作　　者：王庆平[1,2] 吴玉程[1] 洪雨[1] 盘荣俊[1] 闵凡飞[2] 

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 [2]安徽理工大学材料科学与工程学院,安徽淮南232001

出　　处：《功能材料》2010年第3期369-371,共3页Journal of Functional Materials

基　　金：安徽省自然科学基金资助项目(070414180);安徽省教育厅自然科学基金资助项目(KJ2007B0272);合肥工业大学创新群体基金资助项目(103-037016)

摘　　要：利用无压浸渗法制备高体积分数的SiCp/Al复合材料。采用X射线衍射(XRD)和扫描电镜(SEM)对复合材料的相组成、微观组织及断口形貌进行分析,研究了基体合金成分对复合材料抗弯性能的影响。结果表明,以Al-10%Si-8%Mg合金为基体制备的复合材料组织均匀,致密度好,无明显气孔缺陷,界面反应产物为Mg2Si、MgAl2O4和Fe,且抗弯强度高于以Al-10%Si合金为基体制备的复合材料;复合材料整体上表现出脆性断裂的特征。High volume fraction SiC_p/Al composites were fabricated by pressureless infiltration technique.The effect of aluminum matrix on the bending strength of the composites was studied.The microstructures and the fracture morphology of composites were observed by SEM and the components were analyzed by XRD.The results show that the microstructures in the SiC_p/Al-10Si-8Mg composite were quite uniform and appeared to be free of pores and the interfacial reaction products were Mg2Si,MgAl2O4 and Fe.The bending strength of SiC_p/Al-10Si-8Mg composite was better than the SiC_p/Al-10Si composite.Composites have the character of brittleness fracture.

关 键 词：SICP/AL复合材料 微观组织 抗弯性能 无压浸渗 

分 类 号：TG146.22[一般工业技术—材料科学与工程]