In situ transmission electron microscope observation of the formation of fuzzy structures on tungsten
In situ transmission electron microscope observation of the formation of fuzzy structures on tungsten
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DOI：
10.1088/0031-8949/2014/t159/014028
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发表时间：
2014-04-01
期刊：
影响因子：
2.9
通讯作者：
Yoshida, N.
中科院分区：
文献类型：
--
作者：
Miyamoto, M.;Watanabe, T.;Yoshida, N.
为了研究钨纳米结构的形成过程，在氦离子辐照和高温退火过程中进行了原位透射电镜观察。在室温至1273 K条件下，用3kev He+辐照钨，在表面结构无明显变化的情况下产生高密度氦泡。在较高温度下，即使没有氦照射，表面形貌也会发生变化，这可能是由于表面张力驱动钨原子的表面扩散。结果表明，氦辐照增强了这种形貌变化，即氦泡的形成。
To investigate the formation processes of tungsten nano-structures, so called fuzz, in situ transmission electron microscope observations during helium ion irradiation and high temperature annealing have been performed. The irradiation with 3 keV He+ from room temperature to 1273 K is found to cause high-density helium bubbles in tungsten with no significant change in the surface structure. At higher temperatures, surface morphology changes were observed even without helium irradiation due probably to surface diffusion of tungsten atoms driven by surface tension. It is clearly shown that this morphology change is enhanced with helium irradiation, i.e. the formation of helium bubbles.