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Indexed by:期刊论文

Date of Publication:2017-07-01

Journal:JOURNAL OF NUCLEAR MATERIALS

Included Journals:SCIE、EI、Scopus

Volume:490

Page Number:216-225

ISSN No.:0022-3115

Key Words:He2+ ion beam; Irradiation damage; Metallic glass; Tungsten

Abstract:The changes in structure and surface morphology of metallic glasses Fe80Si7.B-43(12.57) and Fe68Zr7B25 before and after the irradiation of He ions with the energy of 300 keV were investigated, and were compared with that of the tungsten. The results show that after the He2+ irradiation, metallic glass Fe68Zr7B25 still maintained amorphous. While a small amount of metastable beta-Mn type phase nanocrystals formed in metallic glass Fe80Si7.B-43(12.57) at the fluence of 4.0 x 10(17)ions/cm(2) (19dpa). The nanocrystals transformed into alpha-Fe phase and tetragonal Fe2B phase as the fluence increased to 1.0 x 10(18)ions/cm(2) (47dpa). Then the new orthogonal Fe3B phase and beta-Mn type phase nanocrystals appeared when the fluence increased further, and the quantities of nanocrystals increased. Blisters and cracks appeared on the surface of tungsten under the irradiation fluence of 1.0 x 10(18)ions/cm(2), however only when the fluence was up to 1.6 x 10(18)ions/cm(2), could cracks and spalling appear on the surfaces of metallic glasses. (C) 2017 Elsevier B.V. All rights reserved.