Results 261 to 270 of about 46,724 (303)

Hydrogen trapping models in steel

Metallurgical and Materials Transactions B, 2000
This article describes the role of hydrogen trapping in steel. Trapping increases the solubility of hydrogen and decreases the diffusivity. Traps are characterized by their nature, i.e., reversible or irreversible, saturable or unsaturable. A dislocation core is a saturable, reversible trap, while voids and crack are unsaturable, reversible traps.
Alfons H. M. Krom, Ad Bakker
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Precipitation and trapping of hydrogen in copper

Philosophical Magazine, 1976
Abstract Copper samples containing dissolved hydrogen up to a few hundred atomic p.p.m. have been prepared by quenching from equilibrium at higher temperatures. Measurements of the annealing of the residual resistivity up to 150°C show that the hydrogen precipitates around room temperature and the precipitation is controlled by diffusion of the ...
W. R. Wampler, T. Schober, B. Lengeler
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Trapping of hydrogen in metals

1978
| 1 Hydrogen can be trapped in many kinds of defects in solids. The binding energy of trapping is of the same order as that for other interstitials (C, N, and O) to defects— few tenths of an eV. However, the high mobility of hydrogen in metals permits equilibrium to be established at much lower temperatures than is true of the other interstitials
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Trapping and cooling of (anti)hydrogen

Hyperfine Interactions, 1993
Magnetic traps offer the possibility for long-term storage and accumulation of atomic antihydrogen. These are invaluable features for revealing subtle differences that may exist between hydrogen and antihydrogen in interaction with electromagnetic or gravity fields. An overview is given of various aspects associated with trapping and cooling of neutral
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Hydrogen trapping by voids in nickel

Scripta Metallurgica, 1987
신소재공학과
LEE, SM Lee, Sung-Man, Lee, JY Lee, Jai Young   +1 more
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Hydrogen Trapping in Mixed Carbonitrides

Acta Materialia, 2023
Philipp Hammer, Lorenz Romaner, Vsevolod I. Razumovskiy   +2 more
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Atomic hydrogen in magnetostatic traps

Physica B: Condensed Matter, 1994
We review the properties of atomic hydrogen as a weakly interacting Bose gas in magnetostatic traps. Various experimental methods are discussed, including Lyman-α spectroscopy and optical cooling.
Walraven, J.T.M., Hijmans, T.W.
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The self-trapping of hydrogen in semiconductors

Physics Letters A, 1988
Abstract Recent theoretical calculations are discussed which show that the minimum energy site for hydrogen in silicon is the bond-centered site, while a secondary minimum is at the anti-bonding site, it is noted that these results are strongly dependent on the relaxation experienced by the silicon atoms neighboring the hydrogen. Several experimental
P. Deák, L.C. Snyder, J.L. Lindström, J.W. Corbett, S.J. Pearton, A.J. Tavendale   +5 more
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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
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Analysis of irreversible hydrogen trapping

Acta Metallurgica, 1982
The influence of irreversible trapping on the hydrogen permeation behaviors is analysed for various coverage kinetics. The coverage kinetics for irreversible traps is determined by a single parameter vi = c0ki(a2D) for a given a2D. It is shown that for intermediate values of vi the permeation flux has in general the first plateau of height (Dc0a ...
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