Features of Structural Changes in Aluminum Specimens with Various Crystallographic Orientation under Ion Irradiation
DS Kryzhevich and AV Korchuganov and KP Zolnikov and SG Psakhie, ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2016, 1783, 020120 (2016).
Atomic structure changes of surface layers of aluminum crystallites after ion bombardment are studied. The molecular dynamics simulation is used for the investigation of structural changes in irradiated crystallites. The results of calculations show that orientation of the irradiated surface and preliminary elastic deformation has a significant impact on features of formation of the atomic structure in the ion- modified layer. The minimal changes in the surface layer are observed at the irradiation of surfaces with 100 lattice planes. A sufficiently great number of stacking faults was formed under irradiation of 111 and 110 surfaces. On the base of the simulation, it can be expected that the process of the surface structure fragmentation is most favorable for cases when surfaces with the 111 and 110 lattice planes are irradiated. An increase in the degree of preliminary elastic deformation can reduce the energy of incident particles, which is necessary for fragmentation of the surface structure.
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