Abstract
In this paper, by using the molecular dynamics method, various defects have been created in graphene/h-BN with interlayer sp3 bonds (G/BN-sp3) by using ion irradiation. The copper-graphene/h-BN layered heterostructure (Cu-G/BN-sp3) were prepared by inserting G/BN-sp3 after irradiation damage into the single crystal copper matrix. The coupling effects of ion irradiation, interlayer sp3 bonds and temperature on defective copper-graphene/h-BN layered heterostructure were studied. The results show with the increase of ion irradiation doses, the mechanical properties of copper layered heterostructure decrease. When defects (caused by ion irradiation) and sp3 bonds coexist, if the defects are created around the sp3 bonds, the composite system is more vulnerable to damage. The location of the defects is an important factor to determine the crack position and fracture direction of copper layered heterostructure. Although ion irradiation and sp3 defects have adverse effects on mechanical properties, the mechanical properties of pure copper are still improved by introducing graphene/h-BN heterostructure. It provides a new way to enhance the radiation resistance and corrosion resistance of copper matrix composites. Meanwhile, controlling and strengthening the properties of copper matrix composites from a new perspective.
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