Abstract：The highly charged ion Ar12+ with an energy of 3 MeV is used for irradiating metallic glass (Cu47Zr45Al8)98.5Y1.5 and polycrystalline metallic W at the irradiation fluences of 1×1014 ions/cm2, 1×1015 ions/cm2 and 1×1016 ions/cm2. The main structure of metallic glass remains an amorphous phase under different irradiation fluences according to x-ray diffraction analysis. The scanning electron microscope observation on the morphologies indicates that no significant irradiation damage occurs on the surface and cross section of the metallic glass sample after different fluences of irradiation, while a large area of irregular cracks and holes were observed on the surface of metallic W at a fluence of 1×1016 ions/cm2, with cracks and channel impairments at a certain depth from the surface. The root-mean-square (rms) roughness of metallic glass increases with increasing fluence of Ar12+, while the reflectance decreases with increasing irradiation fluence. A nano-hardness test shows that the hardness of metallic glass decreases after irradiation. Under certain conditions, metallic glass (Cu47Zr45Al8)98.5Y1.5 exhibits a higher capability of resistance to Ar12+ irradiation in comparison with polycrystalline W.
2015, Vol. 32 
