Gas- and plasma-driven hydrogen permeation behavior of stagnant eutectic-solid GaInSn/Fe double-layer structure

【摘要】 Gas-driven permeation(GDP) and plasma-driven permeation(PDP) of hydrogen gas through Ga In Sn/Fe are systematically investigated in this work. The permeation parameters of hydrogen through Ga In Sn/Fe, including diffusivity,Sieverts’ constant, permeability, and surface recombination coefficient are obtained. The permeation flux of hydrogen through Ga In Sn/Fe shows great dependence on external conditions such as temperature, hydrogen pressure, and thickness of liquid Ga In Sn. Furthermore, the hydrogen permeation behavior through Ga In Sn/Fe is well consistent with the multilayer permeation theory. In PDP and GDP experiments, hydrogen through Ga In Sn/Fe satisfies the diffusion-limited regime.In addition, the permeation flux of PDP is greater than that of GDP. The increase of hydrogen plasma density hardly causes the hydrogen PDP flux to change within the test scope of this work, which is due to the dissolution saturation. These findings provide guidance for a comprehensive and systematic understanding of hydrogen isotope recycling, permeation,and retention in plasma-facing components under actual conditions.更多还原

【Abstract】 Gas-driven permeation(GDP) and plasma-driven permeation(PDP) of hydrogen gas through Ga In Sn/Fe are systematically investigated in this work. The permeation parameters of hydrogen through Ga In Sn/Fe, including diffusivity,Sieverts’ constant, permeability, and surface recombination coefficient are obtained. The permeation flux of hydrogen through Ga In Sn/Fe shows great dependence on external conditions such as temperature, hydrogen pressure, and thickness of liquid Ga In Sn. Furthermore, the hydrogen permeation behavior through Ga In Sn/Fe is well consistent with the multilayer permeation theory. In PDP and GDP experiments, hydrogen through Ga In Sn/Fe satisfies the diffusion-limited regime.In addition, the permeation flux of PDP is greater than that of GDP. The increase of hydrogen plasma density hardly causes the hydrogen PDP flux to change within the test scope of this work, which is due to the dissolution saturation. These findings provide guidance for a comprehensive and systematic understanding of hydrogen isotope recycling, permeation,and retention in plasma-facing components under actual conditions.更多还原