摘要
本文用分析电子显微镜(AEM)对快速凝固Al-8Fe-4Ce-3Ti(重量百分比)条带中—未知相进行了会聚京电子衍射(CBED),X—射线能谱(EDS)及高分辨分析。结果表明:它属于菱方晶系,空间群为R3m,点阵常数a=1.81A(10^(-10)m),C=22.9A.[001]位向下的高分辨像显示了同会聚束一致的对称性。
An Al-rich phase in rapidly solidified (RS) Al-8Wt%Fe-4Wt%Ce-3Wt% Ti ribbon was studied with convergent beam electron diffraction (CBED), high resolution electron microscopy (HREM) and energy dispersive X-ray spectroscopy (EDS) in an analytical elec- tron microscope. Its space group was determined to be R3m. and crystal system to be rhombohedral(a=1.81A, c=22.9A). The symmetry showing in high resolution image with [001] incidence is consisted with that obtained by CBED.
关键词
电子显微镜
快速凝固
热强型合金
Analytical electron microscope
Convergent beam electron diffraction
Energy dispersiveX-ray spectroscopy
High-resolution electron microscopy
Ratid solidification
