Simultaneous irradiation effects of hydrogen and helium ions on tungsten
Simultaneous irradiation effects of hydrogen and helium ions on tungsten
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DOI：
10.1016/j.jnucmat.2008.12.300
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发表时间：
2009-04
影响因子：
3.1
通讯作者：
Y. Ueda;M. Fukumoto;J. Yoshida;Y. Ohtsuka;R. Akiyoshi;H. Iwakiri;N. Yoshida
中科院分区：
文献类型：
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作者：
Y. Ueda;M. Fukumoto;J. Yoshida;Y. Ohtsuka;R. Akiyoshi;H. Iwakiri;N. Yoshida
研究了氢碳混合离子辐照下氦同时辐照对钨起泡的影响。结果发现，仅向 1keV H 和 C 混合离子束 (C: 0.8–1.0%) 添加 0.1% 的 He 离子即可减少 (473K) 或完全抑制 (653K 和 723K) 气泡形成。根据TEM观察，在表面附近形成了尺寸为2nm或更小的He气泡，由于扩散通道的减少或应力场的激发，这些气泡可能成为氢进入块体的扩散势垒，导致氢的扩散率降低。在我们的实验条件下，通过同时氦照射，氢气内流的减少率将超过三倍。
Simultaneous irradiation effects of He on tungsten blistering with hydrogen and carbon mixed ion irradiation were investigated. It was found that only 0.1% addition of He ions to 1keV H and C mixed ion beam (C: 0.8–1.0%) reduced (473K) or completely suppressed (653K and 723K) blister formation. According to TEM observation, He bubbles with the size of 2nm or less were formed near the surface, which could be a diffusion barrier of hydrogen into the bulk due to the reduction of diffusion channel or excitation of stress field, leading to the reduction of diffusivity of hydrogen. The reduction rate of hydrogen inward flux by simultaneous He irradiation in our experimental conditions would be more than the factor of three.