Coalescence mechanism of helium bubble during tensile deformation revealed by in situ small-angle X-ray scattering
Coalescence mechanism of helium bubble during tensile deformation revealed by in situ small-angle X-ray scattering
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DOI：
10.1016/j.scriptamat.2018.08.050
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发表时间：
2019-01
影响因子：
6
通讯作者：
Jie Gao;Hefei Huang;Jizhao Liu;Jianrong Zeng;R. Xie;Yan Li
中科院分区：
文献类型：
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作者：
Jie Gao;Hefei Huang;Jizhao Liu;Jianrong Zeng;R. Xie;Yan Li
用小角X射线散射(SAXS)测量和透射电子显微镜(TEM)表征相结合的方法研究了氦离子辐照下镍箔中产生的氦纳米气泡。SAXS得到的气泡尺寸的对数正态分布与透射电子显微镜的结果符合得很好。在拉应力作用下，对氦纳米气泡的演化进行了SAXS实验。详细的分析表明，气泡在拉应力加载方向上发生了合并伸长。研究结果表明，在外应力作用下，气泡的“形变并聚”机制同样适用于气泡的生长。
Helium nanobubbles created in nickel foil under helium ion irradiation are studied using the combination of small-angle X-ray scattering (SAXS) measurement and transmission electron microscopy (TEM) characterization. The log-normal distribution of bubble sizes obtained by SAXS agrees rather well with the TEM results. Under the tensile stress, SAXS experiments were carried out to followin situthe evolution of helium nanobubbles. A detailed analysis revealed that the bubbles performed coalescenceviathe elongation in the direction of tensile stress loading. Our finding demonstrated that bubble “deformation and coalescence” mechanism was also applicable in bubble growth under external stress.