Mg对无压渗透制备Al/SiC_p陶瓷基复合材料的影响  

Effect of Mg on Pressureless Infiltration Preparation of Al/SiC_p Ceramic Matrix Composites

作　　者：徐跃[1,2] 高霖[1] 崔崇[2] 钱凤[2] 

机构地区：[1]南京航空航天大学机电学院,南京210016 [2]南京理工大学材料科学与工程学院,南京210094

出　　处：《材料开发与应用》2011年第2期14-17,共4页Development and Application of Materials

摘　　要：本文采用无压浸渗法,研究了Mg对Al/SiCp（SiC体积分数为40%-70%）陶瓷基复合材料制备及组织影响。结果表明,Al浸渗液中添加Mg可以显著提高铝液的浸润性,因为Mg扩散并富集于Al/SiCp界面,通过界面反应促使Al2O3膜的破裂降低界面张力,增加了铝合金液的流动性,而且Mg与骨架孔隙内的气氛反应形成负压,促进无压浸渗的自发进行。Influence of Mg on preparation and microstructure of SiCp/Al ceramic matrix composites with SiC volume fraction 40%-70% fabricated by pressureless infiltration is discussed in this paper.Result indicated that addition of Mg in aluminium infiltration liquid could improve infiltration ability evidently.Because magnesium diffused and enriched interface of Al and SiC.Interface reaction made Al2O3 film broken to reduce interface strain,that increased liquidity of aluminium alloy liquid.Reaction of Mg and framework air caused negative press that advanced pressureless infiltration process voluntarily.

关 键 词：Al/SiCp陶瓷基复合材料 无压浸渗 组织 致密度 机理 

分 类 号：TB331[一般工业技术—材料科学与工程]