Effect on structure and mechanical property of tungsten irradiated by high intensity pulsed ion beam
Effect on structure and mechanical property of tungsten irradiated by high intensity pulsed ion beam
复制标题
高强度脉冲离子束辐照对钨结构和力学性能的影响
DOI：
10.1016/j.nimb.2017.03.117
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发表时间：
2017-09-01
影响因子：
1.3
通讯作者：
Wang, Younian
中科院分区：
文献类型：
--
作者：
Mei, Xianxiu;Zhang, Xiaonan;Wang, Younian
采用强流脉冲离子束技术研究了钨的抗热辐射性能。在250 kV加速电压下，不同能量密度、不同脉冲数下，离子束主要由Cn（+）（70%）和H+（30%）组成。GIXRD分析表明，钨没有发生明显的相结构变化，并产生了微应力。扫描电镜分析表明，在低辐照频率（3次和10次）和低能量密度（0.25 J/cm（2）和0.7 J/cm（2））下，钨表面没有明显的辐照损伤。辐照100次和300次后，钨表面出现裂纹。在能量密度为1.4J/cm（2）和2.0J/cm（2）时，钨表面甚至出现脱落现象。随着脉冲次数和能量密度的增加，钨的表面纳米硬度降低。钨在一定的热负荷环境下具有良好的抗热辐射性能。(C)2017爱思唯尔B. V.保留所有权利。
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.