The diffusivity of Hydrogen in palladium

✍ Scribed by H. Katsuta; R.J. Farraro; R.B. McLellan

• Publisher: Elsevier Science
• Year: 1979
• Weight: 331 KB
• Volume: 27
• Category: Article
• ISSN: 0001-6160
• DOI: 10.1016/0001-6160(79)90128-7

✦ Synopsis

The permeability time-lag method has been used to determine the diffusivity of hydrogen in palladium in the temperature range 496-946°C. Previous measurements had indicated a large positive deviation from Arrhenius behavior in the temperature range above 600°C. No such deviation was found in the present measurements. which are in good accord with previous determinations made at lower temperatures. The diffusivity in the temperature range 469-946°C can be represented by the equation 0 = D,exp -$T mz/s ( ) where Do = (2.83 k 0.15) x lo-' m*/s and Q = 21.7 f 1.3 kJ/mole.

R&n&On a mesure la diffusivite de l'hydrogine dans le palladium entre 4% et 946°C. par la methode de l'hysterese de la permeabilite. Des mesures anterieures avaient mis en evidence un grand Ccart positif par rapport a la loi d'Arrhenius, audessus de 600°C. Dans nos mesures, qui sont en bon accord avec des determinations anterieures a des temperatures inferieures, nous n'avons pas trouve un tel &art.