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Wedge disclination quadrupoles and amorphization in deformed nanomaterials. Formation of quadrupole of disclinations (triangles) during (a) stress-driven migration of GBs, (b) GB-sliding-initiated rotational deformation, and (c) nanograin nucleation. (d) Amorphization occurs in nanoscale region ABCD due to transformation of initial disclinations shown in (c).
Dependences of the total energy change on the disclination quadrupole size in (а) Si and (b) . Curves 1, 2, 3, and 4 correspond to values of , 0.3, 0.4, and 0.5, respectively.
Dependences of the critical disclination strength on disclination quadrupole size in Si. Solid and dashed curves correspond to the interface energy change , calculated by formulas (3) and (4) , respectively. Curves 1, 2, and 3 ( , , and ) correspond to values of , 10 and , respectively.
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