Nanoscale amorphization at disclination quadrupoles in deformed nanomaterials and polycrystals

Bobylev, S. V.; Ovid'ko, I. A.
August 2008
Applied Physics Letters;8/11/2008, Vol. 93 Issue 6, p061904
Academic Journal
Special micromechanism of nanoscale amorphization (crystal-to-glass transition in nanoscale regions) in deformed nano- and polycrystalline materials is suggested and theoretically described. The nanoscale amorphization occurs through transformation of disclination quadrupoles generated during plastic deformation. It is shown that the nanoscale amorphization at disclination quadrupoles is energetically favorable in nano- and polycrystalline Si and Si3N4 deformed at high applied stresses in certain ranges of their structural parameters.


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