Results 221 to 230 of about 195,760 (256)

Theory of the diffusion of hydrogen in metals

1978
Hydrogen in metals has large diffusion coefficients compared to other interstitials.1 They are particularly large in the bcc metals V, Nb, and Ta; see Fig.1. In Nb and Ta the isotope H shows a lower activation energy for diffusion below 250 K, resulting in a large isotope effect at lower temperatures.
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Diffusion of hydrogen in metals

Advances in Physics, 1985
Abstract The present status of our understanding of the diffusion of hydrogen in metals, both experimental and theoretical, is reviewed. Discussions are focused on the mechanism of diffusion of hydrogen isotopes H, D and T in f.c.c. and b.c.c. metals; the positive muon (μ +) is referred to where appropriate.
Y. Fukai, H. Sugimoto
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Diffusible hydrogen

2013
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Hydrogen diffusion in Dy2Fe17

Journal of Alloys and Compounds, 1998
Abstract The short-range and long-range diffusion of hydrogen in Dy2Fe17 was investigated by magnetic after-effect (MAE) and thermal desorption spectroscopy (TDS) measurements, respectively. After charging the powder samples in a high-purity H2 atmosphere (15 MPa, 293 K) for 3 days, their hydrogen content was determined by TDS to be Dy2Fe17H0.06 ...
N. Mommer, H. Reule, M. Hirscher, H. Kronmüller   +3 more
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Diffusion of hydrogen in metals

Berichte der Bunsengesellschaft für physikalische Chemie, 1972
AbstractPublished measurements of the diffusion of hydrogen in fcc metals are summarized with particular emphasis on the isotope effect. The observations are generally consistent with the usual rate theory model but with the energy levels in both the equilibrium site and the saddle point quantized according to an Einstein oscillator.
H. K. Birnbaum, C. A. Wert
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Diffusion of Hydrogen

2012
This chapter deals with the diffusion properties of hydrogen in zirconium as driven by mass, stress, and thermal gradients. The relevant diffusion equations are derived starting from the phenomenological theory of irreversible thermodynamics. A general expression for the flux of hydrogen in mass (concentration), stress, and temperature gradients is ...
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Diffusion of hydrogen in metals

Journal of the Less Common Metals, 1984
Abstract The investigation of the diffusion of hydrogen (muons or hydrogen, deuterium or tritium atoms) in metals is aimed on the one hand at understanding the nature of the elementary diffusive step. The extremely large isotope range and the position midway between classical and quantum mechanical transport allows the experimental and theoretical ...
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Hydrogen diffusion in Fe4N: Implication for an effective hydrogen diffusion barrier

International Journal of Hydrogen Energy, 2023
Min Wu, Jing Wang, Baihui Xing, Haojie Zhu   +3 more
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Diffusion of Hydrogen in Semiconductors

1992
The diffusion of hydrogen in semiconductors is rather complex because of the fact that atomic hydrogen can exist in several charge states (notably H+ in p-type material and H− or H0 in n-type material) and also that hydrogen can apparently be present in a number of different forms, namely atomic, molecular or bound to a defect or impurity.
Stephen J. Pearton, James W. Corbett, Michael Stavola   +2 more
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Diffusion of Hydrogen in Aluminium*

Zeitschrift für Physikalische Chemie, 1992
Schlueter, H.J., Zuechner, H., Braun, R., Buhl, H.   +3 more
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