Critical velocity for atom transfer by moving dislocation

1Chernolevskii, MS
1Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
Kosm. nauka tehnol. 2006, 12 ;(5-6):087-090
Publication Language: Ukrainian
We propose a method of the critical velocity calculation for dislocation and internode mass transfer mechanism in the framework of the Frenkel–Kontorova model which takes into account the motion in a crystal of the dislocation + internode atom complex. Elastic dislocation field forms for an internode atom the potential pit near the dislocation nucleus which relates it to the moving dislocation. The stability of the complex is determined both by initial velocities of the dislocation and atom motions and by the interaction value. The critical velocity at which the mass transfer effect disappears in the framework of the mechanism proposed depend on the difference between initial velocities of the dislocation and internode atom.
Keywords: dislocation, internode atom, potential pit
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