Results 211 to 220 of about 37,550 (257)

Permeation of hydrogen through palladium

Journal of Nuclear Materials, 1995
Abstract Palladium membranes have been bombarded by beams of ∼ 10 eV atomic hydrogen with a peak flux and fluence of 4 × 10 16 cm −2 s −1 and 10 20 cm −2 , respectively. The time-dependent permeation resulting from these exposures has been measured as a function of membrane temperature.
J. Park, T. Bennett, J. Schwarzmann, S.A. Cohen   +3 more
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The electro-permeation of hydrogen into metals

Electrochimica Acta, 1970
Abstract It is sought to relate the diffusion coefficient and solubility for hydrogen in metals to the interaction of hydrogen with the metal phase. Determinations of permeation and diffusion coefficient have been made by a very sensitive electrochemical method at room temperature, and in some cases with temperatures up to 80°C, for platinum, nickel,
J.O'M. Bockris, M.A. genshaw, M. Fullenwider   +2 more
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Hydrogen Permeation Measurements on Alumina

Journal of the American Ceramic Society, 2004
The aim of this work is to measure the hydrogen transport and solubility parameters in the commercial alumina. Measurements are conducted using a time‐dependent permeation method over the temperature range 1273–1673 K with hydrogen driving pressures in the range 10 4
E. Serra, A. Calza Bini, G. Cosoli, L. Pilloni   +3 more
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Hydrogen permeation through graphite

Journal of Nuclear Materials, 1988
Abstract As a study of the transport processes of hydrogen in graphite, the kinetics of permeation of hydrogen and argon through graphite was investigated in the pressure range of 0.5 to 100 Pa and in the temperature range of 290 to 983 K. The observed results suggested that the hydrogen permeation through graphite can be dealt with as a simple ...
Tsukasa Kiyoshi, Takashi Namba, Michio Yamawaki   +2 more
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Permeation of hydrogen isotopes in nickel

The Journal of Physical Chemistry, 1978
Tritium permeabilities of nickel over the 500 to 1100 K range have been determined and compared to deuterium and protium permeabilities. Solubility data for the three isotopes have been calculated from these permeability data and literature data for diffusivities.
J. T. Bell, J. D. Redman
openaire   +1 more source

Models for hydrogen permeation in metals

Journal of Applied Physics, 1992
Hydrogen transport in metals is affected by processes occurring in the bulk, the surface/bulk, and gas/surface interfaces. Several models have been proposed to explain the permeation process. Here the development of the various models is discussed and the similarities and differences among them are highlighted.
P. L. Andrew, A. A. Haasz
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Hydrogen permeation study with atomic hydrogen beam

Journal of Nuclear Materials, 1992
Hydrogen permeation through Mo and Ni using an atomic hydrogen beam is examined. Different from ion driven permeation (IDP), the hydrogen permeation rate does not show an appreciable spike, keeping the permeation rate at a constant and reproducible value.
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Permeation of hydrogen through metals

Philosophical Magazine, 1959
Abstract The theory of permeation of hydrogen through certain transition metals has been further developed. It has been shown that this theory, in which certain slow phase-boundary processes couple with diffusion to produce the permeation phenomena, can in rather simple ways predict the observed behaviour.
R. Ash, R. M. Barrer
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Effect of trapping on hydrogen permeation

Metallurgical Transactions A, 1975
Approximate solutions were obtained to the nonlinear partial differential equations derived by A. McNabb and P. K. Foster for a general model of diffusion-plus-trapping. The finite-difference method was applied to their equations for boundary conditions appropriate to hydrogen permeation and evolution in a plane. Solutions are shown to be stable and to
George R. Caskey, William L. Pillinger
openaire   +1 more source

Hydrogen permeation characteristics of La27Mo1.5W3.5O55.5

Journal of Membrane Science, 2014
Abstract Hydrogen permeation in 30% Mo-substituted lanthanum tungsten oxide membranes, La27Mo1.5W3.5O55.5 (LWMo), has been measured as a function of temperature, hydrogen partial pressure gradient, and water vapor pressure in the sweep gas. Transport of hydrogen by means of ambipolar proton–electron conductivity and – with wet sweep gas – water ...
Einar Vøllestad, Camilla K. Vigen, Anna Magrasó, Reidar Haugsrud   +3 more
openaire   +1 more source