合金化热镀锌镀层组织Γ相的结构分析  

Structure analysis of Γ phase in galvannealed coating

作　　者：余金山[1] 刘俊亮[2] 张津徐[1] 吴建生[1] 

机构地区：[1]上海交通大学材料科学与工程学院,上海200030 [2]宝钢分析测试中心物理室,上海201900

出　　处：《材料科学与工艺》2008年第1期99-102,共4页Materials Science and Technology

基　　金：国家自然科学基金资助项目(20171040)

摘　　要：为了研究合金化热镀锌镀层组织Γ相的结构,采用聚焦离子束(FIB)方法制备了合金化热镀锌无间隙原子(IF)钢板镀层横截面透射电镜(TEM)试样,应用TEM对其显微结构进行了观察和选区电子衍射分析,应用X射线能谱仪(EDX)测定了Γ相的化学成分,并介绍了FIB方法制备TEM试样的过程.结果表明,Γ相选区衍射花样中存在明显的超点阵衍射.证明Γ相是一种有序金属间化合物;计算机模拟电子衍射花样的结果给出了Γ相的原子占位.To analyze the structure of Γ phase in galvannealed coating,cross-sectional TEM specimen was repared using focused ion beam（FIB） technique.The microstructure and selected area electron diffraction of Γ phase in galvannealed coating were observed and studied by transmission electron microscopy（TEM）.The chemical composition of Γ phase was measured by X-ray energy dispersive spectroscopy（EDX）.The results show that superlattice reflections exist in the selected area diffraction patterns of Γ phase,which indicates that Γ phase is a kind of ordered intermetallic compounds.Electron diffraction patterns simulated by computer suggest the atomic coordinates of Γ phase in a commercial galvannealed IF steel sheets.

关 键 词：Γ相 TEM FIB 超点阵反射 原子占位 

分 类 号：TG115.21[金属学及工艺—物理冶金]