Hydrogen Diffusion Coefficient during Hydrogen Permeation through Nb-Based Hydrogen Permeable Membranes

Abstract:

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The hydrogen diffusion coefficients are investigated during the hydrogen permeation through Nb-based hydrogen permeable membranes at high temperature. It is found that the hydrogen diffusion coefficient for pure niobium under practical conditions is much lower than the reported values measured for dilute hydrogen solid solutions. Surprisingly, the hydrogen diffusion is found to be faster in Pd-Ag alloy with fcc crystal structure than in pure niobium with bcc crystal structure at 773K during the hydrogen permeation. It is also found that the addition of Ru or W into niobium increases the hydrogen diffusion coefficient under the practical conditions.

Info:

Periodical:

Defect and Diffusion Forum (Volumes 283-286)

Edited by:

Andreas Öchsner, Graeme E. Murch and Ali Shokuhfar

Pages:

225-230

DOI:

10.4028/www.scientific.net/DDF.283-286.225

Citation:

H. Yukawa et al., "Hydrogen Diffusion Coefficient during Hydrogen Permeation through Nb-Based Hydrogen Permeable Membranes ", Defect and Diffusion Forum, Vols. 283-286, pp. 225-230, 2009

Online since:

March 2009

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Price:

$35.00

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