Results 241 to 250 of about 19,353 (291)

Diffusible Weld Hydrogen

Materials Testing, 2001
This research focused on the development of a diffusible hydrogen sensor for steel welds. The sensor is based on the chemochromic reaction of WO 3 with hydrogen. The sensor is inexpensive, produces results quickly and has been shown to correlate with hydrogen concentrations derived using the standard gas chromatography method.
Rodney D. Smith Ii   +4 more
openaire   +1 more source

Diffusion of Hydrogen in Niobium

Physical Review Letters, 1988
The diffusion rate of H and D in Nb is calculated with avoidance of the usual adiabatic, linear-coupling, and Condon approximations. The method employed is a generalization of the standard small-polaron theory with explicit account taken of the coupled interstitial-host vibrations.
, Schober, , Stoneham
openaire   +2 more sources

Hydrogen chemical potentials and diffusion coefficients in hydrogen diffusion membranes

Nature, 1983
Palladium and palladium alloys are quite widely used as membranes for hydrogen permeation, because of their resistance to embrittlement and to irreversible deformations during cycles of absorption and desorption of hydrogen1–3. The isothermal relationships between hydrogen diffusion coefficient, DH, and hydrogen content, n (ratio of hydrogen/metal ...
F. A. Lewis   +3 more
openaire   +1 more source

Silicon-Hydrogen Bonding and Hydrogen Diffusion in Amorphous Silicon

MRS Proceedings, 1995
ABSTRACTDespite its importance for technological applications, the behavior of hydrogen in amorphous silicon is not fully understood. In particular, the anomalously low activation energy (1.5 eV) for hydrogen diffusion has remained unexplained. We investigate the interaction of hydrogen with dangling bonds using first-principles pseudopotential-density-
, Van de Walle CG, , Street
openaire   +2 more sources

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   +3 more
openaire   +1 more source

Visualization of Diffusive Hydrogen

Materials Science Forum, 2010
In recent years, the use of hydrogen as a clean energy has been paid attention to in terms of the prevention of global warming. Tanks composed solely of steel and cylinders consisting of aluminum liner reinforced with C-FRP in the surrounding are used to store high-pressure hydrogen gas in hydrogen stations and in fuel cell vehicles, respectively.
Takahito Watakabe   +2 more
openaire   +1 more source

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