α-Fe小晶粒和2Ha-NbSe_2的会聚束电子衍射研究  

A CBED Study of α-Fe Crystallites and 2Ha-NbSe2

作　　者：杨翠英[1] 周玉清[1] 

机构地区：[1]中国科学院物理所

出　　处：《电子显微学报》1982年第2期57-60,83-84,共6页Journal of Chinese Electron Microscopy Society

摘　　要：本文报导亚稳相α-Fe小晶粒和2Ha-NbSe_2的会聚束电子衍射(CBED~*)的初步研究结果。CBED与常规选区衍射(SAD^(**))相比有下列优点:空间分辨本领高(照射面积为几十nm至几nm),可用于小晶粒结构的研究;能充分揭示晶体的对称性,为测定空间群提供可能性。因而此技术在材料科学中有广泛的应用。在此,我们用CBED观察了从非晶态中析出的α-Fe小晶粒结构;并测定了2Ha-NbSe_2的带轴投影图。The application of CBED in material science is illustrated by two examples.The advantages of CBED are the high spatial resolution of the convergent beam probe(a few tens nm or a few nm)and the symmetry of the convergent beam zone axis patterns.Thus crystallographic information from individual small crystallites embedded in a matrix can be obtained.Smallα-Fe crystallites precipitated from amorphous Tb-Fe films have been studied by this method.The symmetry aspect of CBED is illustrated by the zone axis patterns of 2Ha-NbSe2.

关 键 词：会聚束电子衍射 NbSe2 晶粒结构 小晶粒 FE 

分 类 号：TG14[一般工业技术—材料科学与工程]