Al-Zn-Cu系200℃低铜侧的相平衡  

Phase equilibrium of Al-Zn-Cu system onlow copper side at 200 ℃

作　　者：陈辉[1] 信昕[1] 任玉平[1] 郝士明[1] 李洪晓[1] 

机构地区：[1]东北大学材料与冶金学院,沈阳110004

出　　处：《中国有色金属学报》2004年第6期912-916,共5页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(50171019)

摘　　要：熔制了Al Zn Cu系的13个不同成分的合金,并进行了组织均匀化和平衡冷却至200℃的缓冷处理。通过显微组织观察、X射线衍射分析和电子探针微区成分分析,测定了这13个合金的相组成及成分。结果表明,在200℃时,富铝角α相的Zn、Cu、Al含量(摩尔分数)分别为6.7%、2.0%和91.3%,确定了T′相的成分范围以及Al2Cu3相中Zn的溶解度(摩尔分数)小于4.4%,绘制出了Al Zn Cu系200℃低Cu侧的等温截面相图。The phase composition and constituent of 13 designed alloys in Al-Zn-Cu system were analyzed by optical microscope, X-ray diffraction and EPMA method. These samples were prepared through sufficient homogenization and equilibrium cooling heat treatment from 400 ℃ to 200 ℃. The results show that the contents(in mole fraction) of Zn, Cu and Al of α phase ( rich aluminum phase) at 200 ℃ are 6.7%, 2.0% and 91.3% respectively. The composition range of T′ phase was determined and the solubility(in mole fraction) of Zn in Al_2Cu_3 is less than (4.4%.) The isothermal section diagram of Al-Zn-Cu system on lower copper side at 200 ℃ was constructed.

关 键 词：相图 Al-Zn-Cu三元系 T′相 Α相 

分 类 号：TG113.14[金属学及工艺—物理冶金]