Study of irradiation damage induced by He2+ ion irradiation in Ni62Ta38 metallic glass and W metal

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:406

Article; Proceedings Paper

Zhang, Xiaonan¹  Mei, Xianxiu¹  Zhang, Qi¹  Li, Xiaona¹  Wang, Yingmin¹  Wang, Younian¹ 

[1] Dalian Univ Technol, Key Lab Mat Modificat Laser Ion & Electron Beams, Minist Educ, Dalian 116024, Peoples R China

关键词: Metallic glass;    Helium ions;    Irradiation damage;   

DOI  :  10.1016/j.nimb.2017.03.121

来源: Elsevier

【 摘 要 】

Metallic glasses are considered to possess good resistant against irradiation due to their inherent structural long-range disorder and a lack of grain boundaries. The He2+ with an energy of 300 keV was used to irradiate Ni62Ta38 binary metallic glass to investigate its resistance against the irradiation, and the irradiated behaviour of the metallic glass was compared with that of W metal. The irradiation fluence range over 2.0 x 10(17) ions/cm(2)-1.6 x 10(18) ions/cm(2). The TEM results show that nanocrystals of mu-NiTa phase and Ni2Ta phase appeared in Ni62Ta38 metallic glass under the irradiation fluence of 1.6 x 10(18) ions/cm(2). The SEM results show that the surfaces of Ni62Ta38 metallic glasses maintained flat and smooth, whereas a large area of blisters with peeling formed on the surface of W metal at the irradiation fluence of 1.0 x 10(18) ions/cm(2). It indicates that the critical irradiation fluence of surface breakage of the Ni62Ta38 metallic glass is higher than that of W metal. After the irradiation, stress was generated in the surface layer of W metal, leading to the increase of the hardness of W metal. (C) 201 7 Elsevier B.V. All rights reserved.

【 授权许可】

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