Al_(65)Cu_(20)Fe_(15)准晶颗粒/Al基复合材料在热压过程中的组织变化  

Microstructural evolution of Al_(65)Cu_(20)Fe_(15) quasicrystalline particle/Al matrix composite induced by hot-pressing

作　　者：齐育红[1] 张占平[1] 黑祖昆[1] 史雅琴[1] 徐迎华[1] 

机构地区：[1]大连海事大学船机修造工程实验室,辽宁大连116026

出　　处：《大连海事大学学报》2003年第3期9-12,17,共5页Journal of Dalian Maritime University

基　　金：国家自然科学基金资助项目(60071010).

摘　　要：利用透射电子显微镜(TEM)、电子探针、X射线衍射仪等微观分析技术,研究了Al65Cu20Fe15准晶颗粒 Al基复合材料在不同热压工艺条件下的显微组织结构,以探明组织结构的变化对该新型复合材料性能的影响.结果表明,在热压扩散相变过程中,随热压温度的升高,准晶相中首先产生大量的微畴缺陷,某些方向上原子呈周期性排列,最后,转变为ω Al7Cu2Fe晶体相.热压时间和颗粒体积分数对颗粒的组织结构影响不明显.颗粒中的Cu原子扩散到基体中,结果在纯Al基体中析出θ′和θ Al2Cu相.Microstructural evolution of Al65Cu20Fe15 quasicrystalline particle/Al matrix composite Induced by hotpressing were studied by means of transmission electron microscopy(TEM), electron probe and Xray diffractometer. The experimental results show that many ordered domains were formatted in icosahedral quasicrystals at 550 ℃ of hotpressing and icosahedral quasicrystals transmitted into ωAl7Cu2Fe crystal structure at 650 ℃. The phase transformation behaviour in particles is almost independent on the hotpressing time and the particle volume fraction. In addition, θ′and θAl2Cu precipitated from Al matrix as the result of the diffusion of cu atoms in particle to Al matrix during hotpressing. 

关 键 词：Al65Cu20Fe15准晶颗粒/Al基复合材料 热压 组织结构 微观分析 微畴缺陷 相变 准晶相 

分 类 号：TB33[一般工业技术—材料科学与工程]