Thermally activated step motion observed by high-resolution electron microscopy at a (113) symmetric tilt grain-boundary in aluminium

K. L. Merkle; L. J. Thompson; Fritz Phillipp

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Thermally activated step motion observed by high-resolution electron microscopy at a (113) symmetric tilt grain-boundary in aluminium

机译：通过高分辨率电子显微镜在铝中的（113）对称倾斜晶界处观察到热激活的步进运动

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Grain-boundary migration is demonstrated to proceed by lateral propagation of a small step in a (113), [110] symmetric Al tilt grain-boundary. In-situ high-resolution (transmission) electron microscopy (HREM) at 523 K allowed the study of atomic-scale detail at video rates during the migration process. The grain-boundary translational states on both sides of the step are identical, which leads to a step dislocation. This defect can move laterally by a combination of climb and glide. Dynamic HREM images indicate considerable atomic agitation within the dislocation core. A detailed temporal analysis of the step movements shows small random displacements of the dislocation core.

机译：晶界迁移被证明是通过在（113）[110]对称的Al倾斜晶界中的一小步横向传播而进行的。 523 K的原位高分辨率（透射）电子显微镜（HREM）允许在迁移过程中以视频速率研究原子尺度的细节。台阶两侧的晶界平移状态相同，这导致台阶错位。该缺陷可以通过爬升和滑行的组合而横向移动。动态HREM图像表明位错核心内有大量原子搅动。阶跃运动的详细时间分析显示，位错核心的随机位移较小。

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《Philosophical Magazine Letters》 |2002年第11期|共9页
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K. L. Merkle; L. J. Thompson; Fritz Phillipp;
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2. Thermally activated step motion observed by high-resolution electron microscopy at a (113) symmetric tilt grain-boundary in aluminium [J] . K. L. Merkle, L. J. Thompson, Fritz Phillipp Philosophical Magazine Letters . 2002,第11期

机译：通过高分辨率电子显微镜在铝中的（113）对称倾斜晶界处观察到热激活的步进运动
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机译：高纯度电子显微镜研究（sigma）11（113）/（110）对称倾斜晶界纯al和al-1.5 wt％Cu

Thermally activated step motion observed by high-resolution electron microscopy at a (113) symmetric tilt grain-boundary in aluminium

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