Dynamics evaluation of hydrogen isotope behavior in tungsten simulating damage distribution
Dynamics evaluation of hydrogen isotope behavior in tungsten simulating damage distribution
复制标题
钨中氢同位素行为模拟损伤分布的动力学评估
DOI：
10.1016/j.fusengdes.2019.03.114
复制
发表时间：
2019
影响因子：
1.7
通讯作者：
Yasuhisa Oya
中科院分区：
文献类型：
--
作者：
Moeko Nakata;Keisuke Azuma;Akihiro Togari;Qilai Zhou;Mingzhong Zhao;Takeshi Toyama;Yuji Hatano;Naoaki Yoshida;Hideo Watanabe;Masashi Shimada;Dean Buchenauer;Yasuhisa Oya
0.8用MeV和6MeV的Fe离子注入钨中，产生不同分布的辐照损伤。之后，进行1.0keV氘离子（D2+）注入以评估D保留行为对W中损伤分布的影响。实验结果表明，总D保留降低由0.8 MeV的Fe离子注入引入的损伤浓度附近的表面区域。由于D在W表面附近的积累，D原子在W表面的滞留量降低，而空位团簇和空洞是D原子的稳定捕获点，具有更高的捕获能，这表明D原子在W表面的复合增强了D原子向D2的复合.可以说，氢在PFMs中的滞留行为将由表面附近的损伤分布控制。
0.8 MeV and 6 MeV iron (Fe) ions were implanted into tungsten (W) to produce the irradiation damages with the various damage distributions. Thereafter, 1.0 keV deuterium ion (D2+) implantation was performed to evaluate the D retention behavior on damage distribution in W. The experimental results showed that the total D retentions were decreased by increasing the damage concentration introduced near the surface region by 0.8 MeV Fe ion implantation. The retention of D trapped by vacancy clusters and voids, which would be the stable trapping sites with higher trapping energies, were reduced, suggesting that the recombination of D atom into D2on the W surface was enhanced due to D accumulation near the surface region. It can be said that the hydrogen retention behavior in PFMs will be controlled by the damage distribution near the surface.