高频磁场下制备铝基表面增强梯度复合材料  

Fabrication of Al Matrix Gradient Composites in High Frequency Magnetic Field

作　　者：刘红才[1] 曹志强[1] 张红亮[1] 刘吉东[1] 

机构地区：[1]大连理工大学材料科学与工程学院

出　　处：《特种铸造及有色合金》2008年第3期242-244,共3页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(50274018)

摘　　要：通过向Al-15Mg2Si合金中加SiO2颗粒,利用高频磁场的电磁相分离法成功制备了Al-15Mg2Si和Al/15Mg2Si/Al2O3两种梯度复合材料。分析了两种复合材料的微观组织,讨论了加入SiO2颗粒对微观组织和力学性能的影响,并对两种合金沿径向进行了硬度测量,结果表明,硬度在径向呈梯度分布,满足梯度复合材料外硬内韧的性能特征。The Al-15Mg2Si and Al/15Mg2Si/Al2O3 gradient composites were prepared by introducing SiO2 particle into Al-15Mg2Si alloy in high frequency magnetic field.The effects of SiO2 particle on microstructure and mechanical properties of two kinds of composites were analyzed,and the hardness of the composites in radial was measured.The results indicate that the hardness of the composites in radial exhibits gradient distribution,meeting the demands of the composites with high intensity in outer layer and high flexibility in inner layer.

关 键 词：高频磁场 电磁分离 Al-Mg2Si过共晶合金 梯度复合材料 

分 类 号：TB33[一般工业技术—材料科学与工程]