Results 251 to 260 of about 42,310 (300)

Perturbed hydrogen permeation of a hydrogen mixture—New phenomena in hydrogen permeation by Pd membrane

International Journal of Hydrogen Energy, 2008
Abstract The newly developed constant concentration method was adopted to study the hydrogen permeation of a hydrogen mixture of H 2 + Y through a palladium membrane tube. The hydrogen permeation of the hydrogen mixture differs from that of a single hydrogen feed. For the hydrogen mixture, the well-known Sieverts equation, Q = J
S CHEN, C HUNG, G TU, M REI
exaly   +2 more sources

Hydrogen permeation through magnesium

Journal of Alloys and Compounds, 1999
Abstract Hydrogen permeation characteristics have been investigated for pure magnesium membranes with a palladium overlayer using a gas permeation technique in the temperature range 473–493 K and in the hydrogen pressure range 0.1–10 kPa. For thicker specimens (thickness >2 mm), the permeation process was rate-controlled by the diffusion of hydrogen ...
C Nishimura, M Komaki
exaly   +2 more sources

Hydrogen permeation in twinning-induced plasticity (TWIP) steel

International Journal of Hydrogen Energy, 2018
The hydrogen permeation behavior of twining-induced plasticity (TWIP) steel was studied using a Devanathan-Stachurski hydrogen permeation cell. The TWIP steel exhibited three orders of magnitude lower hydrogen permeation rate as compared to the mild ...
Hossein Béládi, M Bobby Kannan
exaly   +3 more sources

Study of the electrochemical permeation of hydrogen in iron

Corrosion Science, 2009
International audienceHydrogen permeation through iron membranes of different thicknesses was studied by the electrochemical permeation technique. The membranes were charged with hydrogen by galvanostatic cathodic polarization in 0.1 M NaOH at 25 °C.The ...
P Bercot
exaly   +1 more source

The effect of permeation area ratio and shape on hydrogen permeation

Scripta Metallurgica et Materialia, 1994
It is generally agreed that the factors influencing permeation and diffusion hydrogen at room temperature are as follows: the thickness and surface condition of the specimen, composition, microstructure and grain size of the material, hydrogen traps and stress or strain conditions for the specimen, etc.
Lun Liu, Lijei Qiao, Wuyang Chu
openaire   +1 more source

Hydrogen permeation pathways for the hydrogenation reaction of aluminum

Journal of Applied Physics, 2010
The hydrogenation of aluminum is inhibited by the slow diffusion of hydrogen in its hydride AlH3, which covers the surface of aluminum in the initial stages of the reaction. Thus, permeation pathways for hydrogen are introduced by either mixing aluminum powder with boron nitride powder or alloying aluminum with gallium at 10 at. % Ga.
H. Saitoh, A. Machida, Y. Katayama, K. Aoki   +3 more
openaire   +1 more source

Hydrogen permeation into iron

Journal of Applied Physics, 1989
The permeation of deuterium (D) from the gas phase into solution in iron has been measured using a new method based on ion beam analysis. For bare metal surfaces the D uptake was observed to be limited by matrix diffusion through the bulk. The influence of chemisorbed oxygen on the D uptake rate was examined in detail.
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source