Diffusion, permeability, and solubility of hydrogen and deuterium in alloys of palladium with nickel

Gol'tsov, V. A.; Demin, V. B.; Gel’d, P. V.; Kagan, Gerald

doi:10.1007/bf00723600

Cited by 3 publications

(2 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the interaction parameter model, the activity coefficient, 7, of a constituent in a ternary or multicomponent alloy is expressed as a series of terms. For the Pd-Cr-H system, the expression for 7h is In 7h = In 7h°+ fHHNH + cHCr(VCr (10) where 7h°i s the activity coefficient of hydrogen at infinite dilution «hh = s In yn/sNn, «HCr = a In yn/sNcr, and the TV's are concentrations in atom fraction. This model is strictly applicable only to very dilute solutions, but in practice it has been used successfully for moderately concentrated solutions.…”

Section: Discussionmentioning

confidence: 99%

“…At low temperatures and moderate hydrogen pressures, however, a phase change occurs on hydrogen absorption which adversely affects the mechanical properties of palladium. A number of Pd alloy systems have been studied for improved permeation and mechanical properties (see as examples ref [1][2][3][4][5][6][7][8][9][10][11][12]. Alloying of palladium with silver has led to greatly improved properties,1 and a Pd-25 atom % Ag alloy is now used commercially for hydrogen isotope purification and separation processes.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Hydrogen permeation in palladium-chromium alloys

Swansiger¹,

Swisher²,

Darginis³

et al. 1976

J. Phys. Chem.

View full text Add to dashboard Cite

As part of a search for new palladium alloys with attractive permeation characteristics for hydrogen isotopes, alloys containing 9.3,16.8, and 24.2 atom % chromium were evaluated in the temperature range from 322 to 449 K. The permeation coefficient, diffusion coefficient, and hydrogen solubility were all found to decrease with increasing chromium content. The solubility was found to obey Sievert's law in all alloys. The permeation coefficients deviated slightly from classical diffusion-controlled behavior. These deviations are attributed to slow molecular dissociation and adsorption of hydrogen on the surface at low pressures. In some preliminary experiments at high pressure, the Pd-16.8 atom % Cr alloy retained its structural integrity while a commercially available Pd-25 atom % Ag alloy was susceptible to cracking and blistering.

show abstract

Section: Discussionmentioning

confidence: 99%