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Diffusion elastic measurements of hydrogen diffusion in nickel

✍ Scribed by G. Matusiewicz; D.J. Duquette


Publisher
Elsevier Science
Year
1985
Weight
495 KB
Volume
33
Category
Article
ISSN
0001-6160

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✦ Synopsis


The diffusion coetBcient of hydrogen in nickel has been determined at room temperature using a combination of electrochemical charging and measurements of the diffusion-elastic phenomenon. This technique has the advantage of allowing a determinatio.r of the dihtation of nickel due to interstitially diffusing hydrogen in addition to a determination of the diffusion coefficient in metals where diffusion coefficients are low. The results obtained indicate that reasonable diffusion coeiBcients can be easily measured and, in the absence of hydride formation, lattice dilitation was in the range of IO-'/at.% hydrogen. R&n&-Nous avons dCterminC le coellicient de diffusion de I'hydrogene dans le nickel B la tempirature ambiante en combinant une charge ilectrochimique et des mesures du phixromtne de diffusion Clastique. Cette technique p&sente l'avantage de permettre la determination de la dilatation du nickel due a I'hydrog&te diffusant interstitiellenxttt. en plus de la d&termination du coefficient de diffusion dans les mCtaux oti IeacodBcimts de diffusion sont faibles. L.es r&hats que nous avons obtenus montnmt que I'on peut facilcment mesuror des codftcimts de ditTusion misonnables et qu'en l'absence de fotmation d'hydrure, la dilatation du rkscau &it de l'ordre de IO-'/at.% hydrogene. Zaanmu&-Der Waasemtoffdiffuaionskoefliiettt wurde in Nickel bei Raumtemperatur mit einer Kombination van clektrocbcmiacher Bcladung und Messuttg der diffusionsclastischar. Encbeinungen ermittelt. Der Vorteil dieses Verfahrens ist, daB sowohl die Aufweihmg des Nickels dumb den interstitiell diffundierenden Waaaemtoff als au& der DiRrsionskod3zient in denjenigen Metallen, bci denen er &in ist, bestbrunt werden kann. Die erltaiteuen Ergebnisse weisen darauf bin, da8 vaniinftige Diffusionanslcoefiirimten gcmes+n we&n Mnnen, und da8 bei abwesender Hydridbildung die Gitteraufweitung bei IO-'/At.-% Waaserstoff tiegt.


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