原位合成Mg_2Si/Al复合材料的制备和性能研究  

Preparation of In-situ Synthesis Mg_2Si/Al Composite and Property Research

作　　者：吴剑[1] 李德英[1] 万长标[1] 

机构地区：[1]华东交通大学机电学院,江西南昌330013

出　　处：《热加工工艺》2013年第20期112-115,共4页Hot Working Technology

基　　金：载运工具与装备教育部重点实验室资助(12JD06)

摘　　要：通过搅拌铸造法制备了Mg2Si/Al原位复合材料,采用扫描电镜对该复合材料增强相的形貌、大小和分布进行观察,用XRD对该复合材料的成分进行分析,并对其显微硬度、耐磨性和阻尼性进行测试。结果表明,通过机械搅拌铸造法制备了该复合材料,Mg2Si在复合材料中呈白色树枝状,增强颗粒细小,均匀的分布在基体中,增强相与基体的界面清洁,无污染;Mg2Si/Al复合材料的显微硬度、耐磨性和阻尼性均得到了显著提高,其中Mg2Si含量为10%时,该复合材料相对纯铝的显微硬度提高了1.71倍,耐磨性提高了2.42倍,阻尼性提高了9.85倍。In-situ Mg2Si/A1 composite was fabricated by mechanical stirring casting. The reinforced phase morphology, size and distribution of the composite was observed by SEM. The composition was analyzed by XRD, and the microhardness, wear resistance and damping of the composite was studied. The results show that MgaSi/A1 in-situ composite is successfully fabricated by mechanical stirring casting. The reinforcement is white dendritic, small particles, which distributes in the matrix uniformly. The clean interface between reinforcement and matrix has good interracial bonding. The microhardness, wear resistance and damping of the composite is significantly improved. The microhardness of the Mg2Si content of 10% increases by 1.71 times than pure aluminum, the wear resistance increases by 2.42 times and damping increases by 9.85 times.

关 键 词：原位自生 显微组织 显微硬度 耐磨性 阻尼性 

分 类 号：TB333[一般工业技术—材料科学与工程]