Fusion features of monocomponent parts in Janus-like nanoscale clusters under impacts of low- and ultra-low-energy Ar13 and Ar projectiles

Molecular dynamics simulation of metastable Janus-like Ni-Al, Cu-Bi, and Cu-Au clusters with 195 atoms of each component is performed for 200 ps after impacts of Ar13 and Ar ions with different cases of initial energies from 25 to 300 eV. The boiling state of the components is achieved either at a high negative heat of mixing (Al, Ni-Al) or at a low boiling point of at least one of the components (Bi, Cu-Bi), provided that the Ar13 projectiles have the initial energy from 200 eV. In other cases, the Ni-Al cluster is also in a molten state, while the Cu-Bi cluster, as well as the Cu-Au cluster in all impact cases, may be in a molten state or have an atomic structure of varying degrees of the regularity of one/both component(s). The molten clusters form spatial core-shell distributions of the components, while in other cases different degrees and forms of their overlapping and eccentricity are possible during the time of simulation.