Atomic mechanisms of grain structure restructuring in surface of aluminum during ion implantation

DS Kryzhevich and KP Zolnikov and AV Korchuganov, XXXII INTERNATIONAL CONFERENCE ON INTERACTION OF INTENSE ENERGY FLUXES WITH MATTER (ELBRUS 2017), 946, 012023 (2018).

DOI: 10.1088/1742-6596/946/1/012023

The molecular dynamics study of features of structural rearrangements in the surface layer of the aluminum crystallite under ion irradiation was carried out. It is shown that the number of generated defects in the crystallite depends on the irradiation dose and the crystallographic orientation of the irradiated surface. It is revealed that significantly more defects were formed at the irradiation of 111 and 110 surfaces than of the 100 surface. At low irradiation doses the stacking faults were formed only in some grains of the nanocrystalline material. The higher irradiation doses led to grain structure changes in the surface layer. This is connected with melting and crystallization of the surface layer. The grains in the region of the boundary of liquid and crystal phases were centers of crystallization of the liquid surface layer.

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