Hydrogen Permeation through Layered Metallic Films

氢透过层状金属膜的渗透

• 批准号: 03452259
• 负责人: HAYASHI Yasunori
• 金额: $ 3.65万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-03452259/
• 关键词: Hydrogen Permeation; Diffusion; Layered Film; Ion Driven Permeation; 水素; 透過; 積層金属膜; イオン駆動

One of the Application of metal-hydrogen system is to fabricate a hydrogen permeable metalic film. The hydrogen permeable film can be used not only for purification of hydrogen but also for hydrogen evacuating window to avoid the degradation of vaccum by hydrogen leakage. The object of this work is to invent a hydrogen evacuating window by layered metallic films under ion driven permeation.When the partial pressure of hydrogen in a vaccum chamber is higher than outside, the permeable film works as a evacuating window, but in the opposite it becomes a leaking window. The film must have some barrier for permeation, and some driving mechanism is necessary to surmount the barrier when evacuation is needed.The distribution and diffusion of hydrogen in multi-layered films were studied by oscillating permeation experiments. The flow of hydrogen through the layered films could reasonably expressed using solubility and diffusibity in each layer and the boundary condition of constant flow at the interfaces.Ion driven permeation was analized taking into account the diffusion and surface reaction on both side of the mean range of the implantation. The permeation flow was expressed by a different function of irradiation flux depending on the rate determining step.The conclusion is as follows: when a Cu coated Fe film is irradiated from Cu side, back flow is diminished and permeation flow increases.Selecting a good combination of diffusion layer and barrier layer, an efficient hydrogen evacuation window can be operated by ion driven permeation.

金属-氢体系的应用之一是制备透氢金属薄膜。该透氢膜不仅可用于氢气的净化，还可作为氢气抽真空窗口，避免氢气泄漏造成的真空退化。本工作的目的是在离子驱动渗透作用下，利用多层金属膜来制造一种抽氢窗口，当真空室内的氢分压高于外界时，渗透膜作为抽氢窗口，反之则成为漏氢窗口。薄膜必须具有一定的渗透屏障，当需要抽真空时，需要一定的驱动机制来克服屏障。氢在多层膜中的流动可以用各层的溶解度和扩散度以及界面处恒流的边界条件来合理地表示，离子驱动渗透分析考虑了注入平均射程两侧的扩散和表面反应。结果表明：从Cu侧辐照Cu/Fe膜，可减少回流，增加渗透流量，选择良好的扩散层和阻挡层组合，可通过离子驱动渗透实现有效的氢排空窗口。

项目成果

W.M.Shu,Y.Hayashi,A.Tahara: "Hydrogen Permeation and Diffusion in FeーTi Alloys" J.LessーCommon Metals. 172,174. 740-747 (1991)

W.M.Shu、Y.Hayashi、A.Tahara：“Fe-Ti 合金中的氢渗透和扩散”J.Less-Common Metals 172,174 (1991)。

W.M.Shu,K.Okuno,Y.Hyashi,S.Ohira,Y.Naruse: "Implantation Driven Permeation of Deuterium throgh Pure Molydenum" Fusion Technology. 21. 1934-1938 (1992)

W.M.Shu、K.Okuno、Y.Hyashi、S.Ohira、Y.Naruse：“通过纯钼注入驱动氘渗透”聚变技术。

W.M.Shu,K.Okuno,Y.HAyashi,Y.Naruse: "Permeation of Deuterium Implanted into Pure Iron" J.Nuclear Materials. (1993)

W.M.Shu，K.Okuno，Y.HAyashi，Y.Naruse：“氘注入纯铁的渗透”J.Nuclear Materials。

W.M.Shu, K.Okuno, Y.Hayashi, Y.Naruse: "Permeation of Deuterium Implanted into Pure Iron" J. Nuclear Materials. (1993)

W.M.Shu、K.Okuno、Y.Hayashi、Y.Naruse：“氘注入纯铁的渗透”J.核材料。

W.M.Shu,K.Okuno,Y.Hayashi: "A General Model for Ion-Driven Permeation at Steady StateーNew Transport Parametersー" J.Physical Chemistry. (1993)

W.M.Shu、K.Okuno、Y.Hayashi：“稳态离子驱动渗透的通用模型－新传输参数－”J.Physical Chemistry (1993)。