Al-Ni-Ru合金中非平衡凝固组织结构及物相形成特征  

Microstructure and phase formation characteristics of non-equilibrium solidification in Al-Ni-Ru alloy

作　　者：张月颖 罗颖 刘翠秀[1] 刘林林[1] 孙威[1] ZHANG Yue-ying;LUO Ying;LIU Cui-xiu;LIU Lin-lin;SUN Wei(Institute of Microstructure and Property of Advanced Materials,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学固体微结构与性能研究所,北京100124

出　　处：《电子显微学报》2023年第2期153-160,共8页Journal of Chinese Electron Microscopy Society

基　　金：北京市自然科学基金资助项目(No.2212024)。

摘　　要：应用FIB技术以及扫描电镜和透射电镜,对快速凝固的Al_(70)Ni_(20)Ru_(10)合金小球中非平衡凝固组织结构及物相形成/分布进行了表征。结果表明,球内形成的非平衡凝固组织高度复杂,但根据其组织凝固形态和相构成特征,大致可以分为四类,并确定了其中的物相分布。其中在特定的枝晶凝固组织区域中发现了周期为0.4 nm的二维十面体准晶,其具有与已报道的同周期Al-Ni-Ru十面体准晶不同的原子团结构及排列特征。The microstructures,phase formation and distributions in fast-solidified Al_(70)Ni_(20)Ru_(10)alloy balls were characterized by focused ion beam(FIB),scanning electron microscopy(SEM)and transmission electron microscopy(TEM)techniques.The result show that the non-equilibrium solidification structures formed in the alloy balls are highly complex,but they can be roughly divided into four types according to their solidification morphologies and composition.A kind of two-dimensional decagonal quasicrystals with a period of 0.4 nm is discovered,which was formed in the specific solidification region with a dendrite structural feature.The arrangement of small atom clusters is quite different from that of previously-reported Al-Ni-Ru decahedral quasicrystals with the same periodicity.

关 键 词：Al-Ni-Ru 非平衡凝固组织 准晶 电子显微表征 

分 类 号：TG146.2[一般工业技术—材料科学与工程] TG113.12[金属学及工艺—金属材料] O753.3[金属学及工艺—金属学] O766.1[理学—晶体学]