Modeling of hydrogen trapping in the deformed Pd and Pd₇₇Ag₂₃ alloy

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• 作者：Cao ; Y. ; Li ; H.L. ; Szpunar ; J.A. ; Shmayda ; W.
• 关键词：Hydrogen Permeation ; Modeling ; Pd₇₇Ag₂₃ alloys ; Palladium ; Trapping ; Deformation
• 刊名：Materials Science and Engineering ; A
• 出版年：2004
• 期刊代码：61_09215093
• 类别：ms
• 出版时间：August 15, 2004
• 卷：379
• 期：1-2
• 页码：173-180
• 文件大小：320 K

摘要

The effects of Pd and Pd₇₇Ag₂₃ alloy membrane microstructures on hydrogen permeation have been investigated using the electrochemical permeation method. Deformation and annealing have been used to modify the membrane microstructures. The delay of hydrogen permeation in palladium increases when the degree of deformation is increases. The annealing of deformed palladium and Pd₇₇Ag₂₃ accelerates hydrogen diffusion. The annealed metals release hydrogen more rapidly than deformed metals. Also, the Pd₇₇Ag₂₃ alloy needs more time to release hydrogen than pure palladium. The solubility of hydrogen increases in both palladium and Pd₇₇Ag₂₃ when the amount of deformation is increased. A hydrogen trapping model was developed, which allows the prediction of trends of hydrogen permeation through membranes having different structures.