快速凝固Zn_(60)Al_(32)Cu_2Si_6合金的时效相变  

Phase Transformation of Rapidly Solidified Zn_(60)Al_(32)Cu_2Si_6 Alloy during Ageing

作　　者：娄海旖[1] 杨诚笑[1] 严彪[1] 

机构地区：[1]同济大学材料科学与工程学院,上海市金属功能材料开发应用重点实验室,上海200092

出　　处：《上海有色金属》2007年第1期12-15,共4页Shanghai Nonferrous Metals

基　　金：上海市科委资助项目(05nm05028)

摘　　要：采用X射线衍射和透射电子显微镜研究了快速凝固得到的Zn-32wt%Al-2wt%Cu-6wt%Si合金于100℃时效的相变过程,表明快速凝固得到的合金组织较均匀,时效过程中发生了Cellular反应以及调幅分解,时效初期的主要机制是Cellular反应,以后是两者并存,后期的机制以调幅分解为主。The study of phase transformation of the captioned alloy during ageing at 100℃ was performed by using X-ray diffraction and transmission electron microscope. The rapaid solidification was realized by single roll melt spinning technique. It is shown that the microstructure of the alloy thus prepared is mere uniform than that of the same alloy prepared by conventional process after ageing. The phase transformations occurring during aging consist of both cellular reaction and spinodal decompositions with the former prevailing at the early stage of ageing and the latter prevailing at the late stage of ageing while both coexisting at the middle stage of ageing.

关 键 词：锌铝合金 快速凝固 时效 Cellular反应 调幅分解 

分 类 号：TG111.4[金属学及工艺—物理冶金]