The mechanism of grain boundary migration
作者： H Gleiter
DOI: 10.1016/0001-6160(69)90115-1
关键词: Effective diffusion coefficient 、 Microscopy 、 Plane (geometry) 、 Absorption (chemistry) 、 Grain boundary strengthening 、 Grain boundary 、 Materials science 、 Condensed matter physics 、 Crystallography 、 Perpendicular 、 Grain boundary diffusion coefficient
摘要: Abstract It is shown by electron transmission microscopy that a grain boundary has step-like structure. In f.c.c. metals the steps are formed {111} crystal-planes of both grains. The microscopic observations show migration occurs in following way: Under influence driving force, atoms emitted from shrinking into while growing absorb same number out boundary. Therefore, micromechanism absorption and emission leading to movement steps. Due this process, surfaces grains move perpendicular plane Frank spiral mechanism or at junction points boundaries. observed indicates stepped surface adjacent lying between these surfaces.
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