Results 211 to 220 of about 41,725 (261)
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An example of the effect of hydrogen trapping on hydrogen embrittlement
Metallurgical Transactions A, 1981The role of internal hydrogen in reducing the tensile reduction of area of iron-titanium alloys is examined. The population of hydrogen at potential crack nucleii is shown to be controlled by its dynamic interaction with mobile dislocations and its subsequent transport to fixed traps. Expressions are developed for both the number of hydrogen atoms at a
G. M. Pressouyre, I. M. Bernstein
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Hydrogen trapping and hydrogen embrittlement of Mg alloys
Journal of Materials Science, 2017In this paper, the effect of local hydrogen concentration and distribution in magnesium (Mg) alloys is studied in regard to hydrogen embrittlement. Quantitative studies of hydrogen trapping sites and release behavior in AZ91 and AZ31 magnesium alloys are being studied by thermal desorption analysis (TDS).
M. Kamilyan, R. Silverstein, D. Eliezer
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Trapping and spectroscopy of hydrogen
Hyperfine Interactions, 1997I review the results and techniques used by the MIT H↑ group to achieve a fractional resolution of 2 parts in 1012 in the 1S–2S transition in hydrogen [Cesar, D. Fried, T. Killian, A. Polcyn, J. Sandberg, I.A. Yu, T. Greytak, D. Kleppner and J. Doyle, Two-photon spectroscopy of trapped atomic hydrogen, Phys. Rev. Lett.
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Magnetic Trapping of Spin-Polarized Atomic Hydrogen
Japanese Journal of Applied Physics, 1987We have confined over 5×1012 atoms of hydrogen in a static magnetic trap. The atoms are loaded into the trap by precooling with a dilution refrigerator. At operating densities near 1×1013 cm-3 the gas is observed to be electron- and nuclear-polarized in the uppermost hyperfine state.
, Hess +5 more
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The solubility and trapping of hydrogen in vanadium
Acta Metallurgica, 1973Abstract Solid solutions of hydrogen in vanadium are affected greatly by the presence of other interstitials carbon, nitrogen and oxygen. The solutions depart drastically from randomness at low temperatures and the solvus line is pushed to higher equilibrium hydrogen concentration as the concentration of these interstitials is increased.
H.Y Chang, C.A Wert
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Trapping of hydrogen implanted into titanium
Journal of Applied Physics, 1988Depth profiles and annealing behaviors of hydrogen implanted into titanium samples at an energy of 10 keV per nucleon were measured in the implantation temperature and fluence ranges of 77–400 K and of 6.3×1016–3.3×1018 H/cm2, respectively. Trapping enthalpies are deduced from the annealing curves.
Y. Takeuchi +4 more
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Hydrogen trapping by voids in nickel
Scripta Metallurgica, 1987신소재공학과
LEE, SM Lee, Sung-Man +1 more
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Atomic hydrogen in magnetostatic traps
Physica B: Condensed Matter, 1994We 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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1989
The rapid development of techniques for cooling and trapping atoms using laser light has created a new subfield of atomic physics. Research opportunities include the study of matter at ultra low temperature, ultra precise atomic spectroscopy and the study of light-matter interaction in a new quantum regime.
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The rapid development of techniques for cooling and trapping atoms using laser light has created a new subfield of atomic physics. Research opportunities include the study of matter at ultra low temperature, ultra precise atomic spectroscopy and the study of light-matter interaction in a new quantum regime.
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The self-trapping of hydrogen in semiconductors
Physics Letters A, 1988Abstract 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 +5 more
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