基体中Si含量对Al-Si/SiCP复合材料界面结合的影响  

Influence of Si Content in Matrix on Interfacial Combination of Al-Si/SiC_P Composite

作　　者：李明伟[1] 韩建民[2] 

机构地区：[1]辽宁工程技术大学材料科学与工程系,辽宁阜新123000 [2]北京交通大学机电学院,北京100044

出　　处：《热加工工艺》2008年第9期38-40,共3页Hot Working Technology

基　　金：国家863项目(2003AA331190)

摘　　要：采用扫描电镜对SiC颗粒增强Al-7%Si(质量分数,下同)、Al-12%Si和Al-22%Si三种铝基复合材料中基体/SiC的界面结合状况进行了研究,结果表明:尽管基体合金中的Si含量不同,但复合材料的基体/SiC界面都有Si相小颗粒析出;在w(Si)=12%的共晶Al-Si合金为基体的复合材料中,SiC颗粒周围Si相小颗粒数量最多。Si相存在于SiC颗粒与铝合金基体之间,一边与基体相连,另一边与SiC增强体相连,起到了"连接桥"的作用,改善了复合材料的界面结合质量。The interracial combinations between SiC reinforcement and aluminum matrix in SiC particle reinforced Al-7%Si （mass fraction）, Al-12%Si and Al-22%Si composites were studied by the scanning electron microscopy （SEM）. The results showe that there is Si deposits on the interface between SiC reinforcement and aluminum matrix, though the Si content in the matrix is different. In the composites of Al-12%Si alloy, the quantities of small particles Si around SiC particles are the most. Si connects with SiC reinforcements in one side and with aluminum matrix in the other side, Si phase plays as a connecting bridge, which improves the interfacial combination of Al-Si/SiCP composite.

关 键 词：SI 铝基复合材料 界面结合 

分 类 号：TG146.21[一般工业技术—材料科学与工程]