氧化物表面的侧表面原子成象——Ⅰ.Eu_2O_2晶体由位错滑移形成表面台阶的动态原位观察

通过高分辨电子显微术获得了Eu_2O_3晶体分子清洁的表面侧面原子成象,观察到了由表面附近位错滑移出表面而形成表面原子台阶的动态变化过程,同时还观察到了此种表面台阶的形核生长。     

INVESTIGATIONS ABOUT THE DYNAMICAL ELECTRON SCATTERING BY A HEXAGON-PRISM β-Si3N4 WHISKER

The dynamical electron scattering effects by a hexagon-prism β-Si₃N₄ whisker were investigated. The 002 dark field images of the wedges of the whisker along [110] direction showed sinusoidal fringes, in which there existed great differences in fringe period under two- and N-beam conditions. Fine structures of the corresponding diffraction spots under two-beam condition were also very different from those under many-beam condition. Such dynamical scattering effects were analyzed quantitatively.     

INVESTIGATIONS ABOUT THE DYNAMICAL ELECTRON SCATTERING BY A HEXAGON-PRISM β-Si3N4 WHISKER

The dynamical electron scattering effects by a hexagon-prism β-Si₃N₄ whisker were investigated. The 002 dark field images of the wedges of the whisker along [110] direction showed sinusoidal fringes, in which there existed great differences in fringe period under two- and N-beam conditions. Fine structures of the corresponding diffraction spots under two-beam condition were also very different from those under many-beam condition. Such dynamical scattering effects were analyzed quantitatively.     

由Tb4O7晶体清洁(111)表面生成60°混合位错的直接原子成象

本文通过对Tb₄O₇晶体清洁(111)表面的侧面象原位观察,获得了从(111)表面生成60°混合位错的动态过程的原子象。 关键词：     

由Tb_4O_7晶体清洁(111)表面生成60°混合位错的直接原子成象

本文通过对Tb_4O_r晶体清洁(111)表面的侧面象原位观察,获得了从(111)表面生成60°混合位错的动态过程的原子象。