Al超微粒子的组织结构及表面状态  

STRUCTURE AND SURFACE CONDITION OF ULTRAFINE Al PARTICLES

作　　者：孙秀魁[1] 陈文绣[1] 徐坚[1] 范学书[1] 魏文铎[1] 吴玉琨[2] 彭应国[2] 

机构地区：[1]中国科学院金属研究所,快速凝固非平衡合金国家重点实验室 [2]中国科学院金属研究所固体原子像开放实验室

出　　处：《金属学报》1992年第5期A196-A201,共6页Acta Metallurgica Sinica

摘　　要：本工作采用惰性气体蒸发法制备Al超微粒子,采用高分辨透射电子显微镜,X射线衍射和X光电子谱等多种分析技术,详细研究了Al超微粒子的结晶形态、晶体结构、表面状态和组成,结果指出,在高纯惰性气氛中制备的Al超微粒子具有明显的结晶形态,大部分粒子为一单晶体,晶体结构为fcc,α_0=0.405nm,结果还发现,Al超微粒子表面存在一层非晶Al_2O_3,平均厚约2nm,对粒子本身具有很好的保护作用,因此,用惰性气体蒸发法制备的Al超微粒子在空气中是相当稳定的。The crystal habit, crystalline structure, surface condition and composition of the ultrafine Al particles, prepared by an inert gas evaporation method, were studied in detail by means of high resolution transmission electron microscope, X-ray diffraction and X-ray photo-electron spectrum. The particles are of clear crystal habits, single crystal in a large ma- jority and fcc crystalline structure with α_0=0.405 nm. A protective layer of amorphous Al_2O_3, 2 nm in average thickness, against oxidizing further was found around the particles. It is believed that the ultrafine Al particles prepared by the inert gas evaporation method are very stable in atmosphere.

关 键 词：Al超微粒子 组织结构 表面状态 

分 类 号：TG113.11[金属学及工艺—物理冶金]