基体中Mg含量对空气气氛下无压浸渗SiC_p/Al微观结构的影响  

Effect of Mg Content in Matrix on Microstructure of SiC_p/Al Composite Produced by Pressureless Infiltration in Air

作　　者：杨亚云[1] 林文松[1] 吴晓[1] 王婕丽[2] 

机构地区：[1]上海工程技术大学材料工程学院,上海201620 [2]上海工程技术大学实训中心,上海201620

出　　处：《人工晶体学报》2016年第5期1375-1379,共5页Journal of Synthetic Crystals

基　　金：上海市教委创新基金(13zz133);上海工程技术大学研究生科研创新资助项目(15KY0506)

摘　　要：在空气气氛下,采用无压浸渗法制备高体积分数(65%)碳化硅颗粒增强铝基复合材料(Si Cp/Al)。探究铝镁合金基体中Mg含量对Si Cp/Al复合材料微观结构的影响。XRD和SEM被用作复合材料微观组织及断口形貌分析。结果表明:当基体中Mg含量低于6wt%时,复合材料出现明显的分层现象。Mg含量达到8wt%后,分层消失,材料内部出现不完全浸渗区域。随着基体中Mg含量不断增加,不完全浸渗区域逐渐消失,Mg含量达到14wt%后,Si C预制体可完全被合金基体浸渗,复合材料内部结构均匀。这可能是与Mg相关的界面反应促进了自发浸渗。High volume fraction（65%） SiC_p/Al composites were fabricated by pressureless infiltration in the atmosphere of air.The Effect of Mg content in the Al matrix on the microstructure of SiC_p/Al composites was investigated.The microstructure and fracture morphology of the composite were analyzed by XRD and SEM.The results show that the stratification exists in the composite with the matrix in which the addition of Mg is less than 6wt%.Until Mg in the matrix reaches 8wt%,stratification disappeared and the Al-8wt% Mg matrix is porous and unconsolidated.The SiC_p/Al composite with 14wt% Mg addition in the matrix is fully infiltrated.The interfacial reactions associated with Mg promote spontaneous infiltration.

关 键 词：SIC p/Al Mg 无压浸渗 微观结构 界面反应 

分 类 号：TB333[一般工业技术—材料科学与工程]