Gas-driven permeation of deuterium through tungsten with different microstructures
Gas-driven permeation of deuterium through tungsten with different microstructures
复制标题
不同微观结构钨的气体驱动氘渗透
DOI：
10.1016/j.fusengdes.2016.09.003
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发表时间：
2016
影响因子：
1.7
通讯作者：
Guang-Nan Luo
中科院分区：
文献类型：
--
作者：
Feng Liu;Haishan Zhou;Yuping Xu;Xiao-Chun Li;Mingzhong Zhao;Tao Zhang;Zhuoming Xie;Qing-Zhi Yan;Xiaoxin Zhang;Fang Ding;Songlin Liu;Guang-Nan Luo
研究了氘 (D) 通过各种钨 (W) 材料（包括轧制、退火、再结晶 W 和 ZrC/La2O3 弥散强化 W）的渗透行为。实验是在 700–1000 K 的温度范围内使用气体驱动渗透设施进行的。D 的渗透率对 W 中的位错/空位或 ZrC/La2O3 相不敏感，测量的渗透值与 Frauenfelder 和 Zahkarov 的数据相当。然而，D 的扩散率取决于微观结构。缺陷密度越高，测得的有效扩散率越低。这些结果意味着W中的位错/空位或少量的ZrC/La2O3相不会影响通过第一壁的氢同位素稳态渗透通量。
Permeation behavior of deuterium (D) through various tungsten (W) materials, including rolled, annealed, recrystallized W and ZrC/La2O3-dispersion strengthened W, has been studied. Experiments were performed using a gas-driven permeation facility in the temperature range of 700–1000 K. The permeability of D was not sensitive to the dislocations/vacancies or ZrC/La2O3phases in W, and the measured permeation values are comparable to Frauenfelder and Zahkarov’s data. The diffusivity of D, however, is microstructure dependent. The higher the density of defects was, the lower the effective diffusivity was measured. These results imply that dislocations/vacancies or small amounts of ZrC/La2O3phases in W will not influence the hydrogen isotopes steady state permeation flux through the first wall.