高频磁场下原位合成Al_3(Ti_(0.5)Zr_(0.5))_p/6005A复合材料的显微组织与性能  

Microstructure and Properties of In-Situ Synthesized Al_3(Ti_(0.5)Zr_(0.5))_p/6005A Composites under High-frequency Magnetic Field

作　　者：祝晓辉[1,2] 赵玉涛[1] 李桂荣[1] 陈刚[1] 佘昌俊[1] 轩动华[1] 郑梦[1] 

机构地区：[1]江苏大学材料科学与工程学院,镇江212013 [2]南京宝色股份有限公司,南京211178

出　　处：《机械工程材料》2011年第3期71-75,共5页Materials For Mechanical Engineering

基　　金：国家"863"高技术研究项目(2007AA03Z548);江苏省六大人才高峰项目(06-D-021);江苏大学高级专业人才科研启动基金资助项目(07JDG084);教育部科学技术研究重点项目(207038)

摘　　要：以K_2TiF_6、K_2ZrF_6与Na_3AlF_6为反应物,在高频磁场下,采用熔体反应法原位合成了Al_3(Ti_(0.5)Zr_(0.5))_p/6005A复合材料;通过扫描电镜、X射线衍射仪、拉伸试验机等对复合材料的组织与性能进行了研究。结果表明:磁场下原位生成了细小的Al_3(Ti_(0.5)Zr_(0.5))颗粒,平均尺寸为1～3μm,且弥散分布于基体中;在磁场频率为2MHz时复合材料的屈服强度、抗拉强度分别为279.4,305.8MPa,较基体的提高了7.1%和8.7%,伸长率为9.5%,较基体的下降了10.1%;复合材料的断裂特征由基体的韧性断裂转变为混合型断裂。Al3 （Ti0.5 Zr0. 5） p/6005A composites were in-situ synthesized under high-frequency magnetic field by direct melt reaction using K2TiF6, K2ZrF6 and Na3AlF6 as reactants. By means of scanning electron microscopy, X-ray diffraction and tensile testing machine, the microstructure and properties of the composites were investigated. The results show that the in-situ synthesized particles under magnetic field were fine Al3 （Ti0. 5 Zr0.5 particles, whose average size was 1-3 tim and dispersively distributed in Al substrate. At magnetic frequency of 2 MHz, the yield strength, tensile strength of the composites were 279. 4 and 305.8 MPa, which increased by 7. 1% and 8. 7% compared with that of the substrate. And the elongation was 9. 5%, which decreased by 10. 1%. The fracture characteristics of the composites transformed from ductile fracture of the substrate to mixing fracture.

关 键 词：铝基复合材料 高频磁场 原位反应 

分 类 号：TB331[一般工业技术—材料科学与工程]