Blister formation on tungsten surface under low energy and high flux hydrogen plasma irradiation in NAGDIS-I
Blister formation on tungsten surface under low energy and high flux hydrogen plasma irradiation in NAGDIS-I
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DOI：
10.1016/s0022-3115(02)01349-1
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发表时间：
2003-03
影响因子：
3.1
通讯作者：
M. Ye;H. Kanehara;S. Fukuta;N. Ohno;S. Takamura
中科院分区：
文献类型：
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作者：
M. Ye;H. Kanehara;S. Fukuta;N. Ohno;S. Takamura
介绍了在偏滤器等离子体模拟器NAGDIS-I中，在低能量(<；100 eV)和高离子通量(>；1021M−2S−1)氢等离子体辐照下，粉末冶金钨(PM-W)表面形成氢泡的实验结果。在不同的样品温度和流量下，将钨样品暴露在稳态氢等离子体中。在低于950K的表面温度下，钨表面能明显观察到氢泡的形成，水泡的大小从10μm到100μm不等，发现氢泡的形成明显依赖于表面温度和入射氢离子注量。当表面温度高于950K时，即使注量足够大，也不会在钨表面观察到起泡。
This study presents experimental results on hydrogen blister formation on powder metallurgy tungsten (PM-W) surface under low energy (<100 eV) and high ion flux (>1021m−2s−1) hydrogen plasma irradiation in a divertor plasma simulator-NAGDIS-I. The tungsten samples were exposed to steady-state hydrogen plasma at various sample temperatures and fluences. Hydrogen blister formations are clearly observed on tungsten surface at the surface temperature below 950 K. The blister size is from a few 10 μm to a few 100 μm. It was found that the blister formations obviously depend on the surface temperature and the incident hydrogen ion fluence. No blisters are observed on tungsten surface at the surface temperature above 950 K even if the fluence is high enough.