Al-Cu-Fe系初生准晶相凝固过程的电子显微分析  

Transmission electron microcopy analyses on the solidification process of primary Al-Cu-Fe icosahedral quasicrystal phase

作　　者：赵东山[1] 王仁卉[2] 桂嘉年[2] 沈宁福[1] 瞿文榜[2] 郭新勇[3] 吴志申[3] 张治军[3] 孙丽虹[4] 

机构地区：[1]郑州大学材料工程学院,河南郑州450002 [2]武汉大学物理系,湖北武汉430072 [3]河南大学润滑与功能材料开放实验室,河南开封475001 [4]北京有色金属研究总院,北京100088

出　　处：《电子显微学报》2002年第4期455-460,共6页Journal of Chinese Electron Microscopy Society

基　　金：国家自然科学基金资助项目 (No .199740 3 0 )~~

摘　　要：采用包括金相 (OM) ,粉末X射线衍射 (XRD) ,扫描电子显微 (SEM)观察和透射电子显微 (TEM)分析等方法 ,研究了铸态Al59 2 Cu36 8Fe3 0 Si1 0 合金 (70 0℃保温 2 5h后水淬 )的显微组织及相组成。发现铸锭中存在 4种相 :准晶I相 ,τ3相 (或相 ) ,θ Al2 Cu相和 η AlCu相。凝固过程可描述为 :初生晶是准晶I相 ;在保温过程中发生包晶或共晶反应 (L +i→τ3(或)或L→τ3(或) +i)形成的τ3相 (或相 ) ,呈微畴结构 ;而剩余液体水淬形成θ Al2 Cu相和ηBy using metallographic observation by optical microscope(OM),scanning electron microscopy (SEM), X ray diffraction techniques (XRD) and transmission electron microscopy (TEM),we have studied the microstructures and constituent phases of the Al 59 2 Cu 37 Fe 3Si 0 8 alloy, water quenched after retaining 2 5 hours at 700℃. Our study revealed that, there are four phases in the experimented alloy: the primary solidified icosahedral quasicrystal phase (i.e. the i phase), τ 3 or  phase, η(AlCu) phase and θ(Al 2Cu) phase. The solidificaton process can be described as follows: the i phase first solidified from melt, then the τ 3 or  phase growed up (L+i→τ 3 or , or L→i+τ 3 or ) during the retaining at 700℃, and when quenched into water, the remaining liquid solidified as η(AlCu) phase and θ (Al 2Cu) phase.

关 键 词：Al-Cu-Fe系 电子显微分析 凝固组织 初生准晶相 凝固过程 铝铜铁合金 

分 类 号：O753.3[理学—晶体学] TG111.4[金属学及工艺—物理冶金]