高频磁场下制备Al-Mg_2Si-Al_2O_3梯度复合材料  

Fabrication of Al-Mg_2Si-Al_2O_3 graded composite material under 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]大连理工大学铸造工程研究中心,辽宁大连116024

出　　处：《功能材料》2008年第2期216-219,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50274018)

摘　　要：通过向Al-20%Mg2Si合金中加入5%SiO2颗粒,利用高频磁场的电磁相分离法成功制备了Al-20%Mg2Si和Al-20%Mg2Si-5%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颗粒对微观组织和机械性能的影响,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 paper introduces the method of producing the two graded composite material of Al-20%Mg2Si and Al-20%Mg2Si-5%Al2O3 by adding SiO2 particles into Al-20%Mg2Si alloy under the high frequency magnetic field.The microcosmic structures of two composite materials are analyzed and the effect on microcosmic structure and the mechanical property added with SiO2 particles are discussed.The hardness is tested along the radial way,the result shows that the hardness distributes in gradient way and meets the demand that the outer area is high intensity but the center area is flexile.

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：TG135.6[一般工业技术—材料科学与工程] TG146.2[金属学及工艺—合金]