Effect on structure and mechanical property of tungsten irradiated by high intensity pulsed ion beam

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

卷:406

Article; Proceedings Paper

Mei, Xianxiu¹  Zhang, Xiaonan¹  Liu, Xiaofei¹  Wang, Younian¹ 

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

关键词: High intensity pulsed ion beam;    Tungsten;    Irradiation damage;   

DOI  :  10.1016/j.nimb.2017.03.117

来源: Elsevier

【 摘 要 】

The anti-thermal radiation performance of tungsten was investigated by high intensity pulsed ion beam technology. The ion beam was mainly composed of Cn(+) (70%) and H+ (30%) at an acceleration voltage of 250 kV under different energy densities for different number of pulses. GIXRD analysis showed that no obvious phase structural changes occurred on the tungsten, and microstress generated. SEM analysis exhibited that there was no apparent irradiation damage on the surface of tungsten at the low irradiation frequency (3 times and 10 times) and at the low energy density (0.25 j/cm(2) and 0.7 j/cm(2)). Cracks appeared on the surface of tungsten after 100-time and 300-time irradiation. Shedding phenomenon even appeared on the surface of tungsten at the energy densities of 1.4 j/cm(2) and 2.0 j/cm(2). The surface nan-hardness of tungsten decreased with the increase of the pulse times and the energy density. The tungsten has good anti-thermal radiation properties under certain heat load environment. (C) 2017 Elsevier B.V. All rights reserved.

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