| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1680591 | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms | 2015 | 7 Pages |
•500 keV He2+ irradiated Fe-based amorphous, metallic W and alloy V90.62Cr4.69Ti4.69.•Irradiated Fe80Si7.43B12.57 remained amorphous without significant surface damage.•Tiny helium bubbles appeared near surface and helium range end of Fe80Si7.43B12.57.•Larger sunken areas appeared on the surface of some grains of W.•Fe80Si7.43B12.57 better resisted to He2+ irradiation than W and V90.62Cr4.69Ti4.69.
He2+ ion beam irradiated metallic glass strip Fe80Si7.43B12.57, metallic W and alloy V90.62Cr4.69Ti4.69 with the energy of 500 keV were used to compare their characteristics of resistance to irradiation at the fluence of 1 × 1017, 2 × 1017, 5 × 1017 and 1 × 1018 ions/cm2. Metallic glass Fe80Si7.43B12.57 remained amorphous at different fluence of He2+ irradiation without significant surface damage. The root mean square roughness became greater after irradiation and increased slightly with the increase of fluence. Transmission electron microscopy analysis revealed the presence of tiny helium bubbles near the surface and the end of the range of helium ions in the metallic glass. The metallic glass kept good soft magnetic properties. For metallic W at the fluence of 1 × 1018 ions/cm2 larger sunken areas appeared on the surface of some grains and the root mean square roughness increased significantly. Alloy V90.62Cr4.69Ti4.69 blistered and flaked at the fluence of 5 × 1017 ions/cm2 and even multi-layer flaking occurred when the fluence reached 1 × 1018 ions/cm2. The resistance to He2+ ion beam irradiation of metallic glass Fe80Si7.43B12.57 was better than that of metallic W and that of alloy V90.62Cr4.69Ti4.69 was the poorest.
