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タイトルGas-phase hydrogen permeation through alpha-titanium - Surface film and dimensional effects
著者(英)Johnson, D. L.; Shah, K. K.
著者所属(英)Nebraska Univ.|NASA Ames Research Center
発行日1982-01-01
言語eng
内容記述The process of hydrogen transport through alpha-Ti involves simultaneous diffusion and phase boundary reactions at both surfaces, with the relative effect on each surface depending on the extent of surface contamination as well as the physical dimensions of the titanium membrane used. It is shown by the present study that hydrogen permeation in commercially pure alpha-Ti increases exponentially with temperature and is dependent on the first power of the input pressure, whether the surface is as-polished, preoxidized or prenitrided. Permeation decreases in the case of the as-polished condition if nitride or oxide films are formed at the surface in contact with source hydrogen, while increasing slightly for the same condition if such films are formed at the hydrogen exit surface.
NASA分類METALLIC MATERIALS
レポートNO82A39671
権利Copyright
URIhttps://repository.exst.jaxa.jp/dspace/handle/a-is/409554


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