Results 31 to 40 of about 2,058,598 (234)

Time-dependent H2 formation and protonation

, 2009
Methods: The microscopic equations of H2-formation and protonation are integrated numerically over time in such a manner that the overall structures evolve self-consistently under benign conditions. Results: The equilibrium H2 formation timescale in an H
Bakes, Bensch, Chieze, Cox, Crawford, Deshpande, Draine, Federman, Goldsmith, Gry, H. S. Liszt, Jenkins, Jenkins, Jura, Le Petit, Le Teuff, Lee, Liszt, Liszt, Liszt, Liszt, Liszt, Liszt, Liszt, Liszt, Lucas, Lucas, McCall, McCall, McKee, Meyer, Moore, Nash, Rawlings, Savage, Savage, Wannier, Weingartner, Wolfire, Wolfire   +39 more
core   +1 more source

Oxide‐Free Titanium Coatings by Wire Arc Spraying in a Silane‐Doped Inert Atmosphere

Advanced Engineering Materials, EarlyView.
A silane‐doped argon atmosphere enables the production of oxide‐free titanium coatings via twin‐wire arc spraying at ambient pressure. This innovative approach eliminates residual oxygen, creating process conditions that prevent oxidation and nitride formation.
Manuel Rodriguez Diaz, Maik Szafarska, René Gustus, Kai Möhwald, Hans Jürgen Maier   +4 more
wiley   +1 more source

Investigation of Thermo‐Chemical Processes in Commercial MgO‐C Refractory Bricks With and Without MgO‐C Recyclate at Elevated Temperatures

Advanced Engineering Materials, EarlyView.
This study investigates thermo‐chemical processes during high‐temperature testing of two commercial MgO‐C brick grades, one containing 47.5 wt.% MgO‐C recyclate. Using ETV, DTA/TG‐MS, XRD, and SEM/EDS/EBSD, mechanisms such as carbothermal reduction of magnesia, impurity incorporation into the secondary MgO surface layer, and calcium‐rich phase ...
Alexander Schramm, Jana Hubálková, Christian Schimpf, Thomas Schemmel, Christos G. Aneziris, Anja Weidner, Horst Biermann   +6 more
wiley   +1 more source

Cavitation-induced ignition of cryogenic hydrogen-oxygen fluids

, 2011
The Challenger disaster and purposeful experiments with liquid hydrogen (H2) and oxygen (Ox) tanks demonstrated that cryogenic H2/Ox fluids always self-ignite in the process of their mixing.
C. B. Muratov, Cole M. D., E. Ponizovskaya-Devine, Landau L. D., M. Foygel, V. N. Smelyanskiy, V. V. Osipov, Vaughn D.   +7 more
core   +1 more source

Warm molecular hydrogen in the Spitzer SINGS galaxy sample [PDF]

, 2007
(simplified) Results on the properties of warm H2 in 57 normal galaxies are derived from H2 rotational transitions, obtained as part of SINGS. This study extends previous extragalactic surveys of H2, the most abundant constituent of the molecular ISM, to
Aalto S., B. T. Draine, Bajaja E., Braine J., Burton M. G., C. Bot, C. W. Engelbracht, Contini T., D. A. Dale, D. Calzetti, D. J. Hollenbach, Desert F. X., E. J. Murphy, E. Schinnerer, Elfhag T., F. Walter, G. Helou, Gatley I., Giard M., H. Roussel, Israel F. P., Israel F. P., J. D. Smith, Knapen J. H., Kohno K., Kohno K., L. Armus, Leon S., Lepp S., M. D. Thornley, Mauersberger R., Moorwood A. F., Moorwood A. F., Nakanishi H., Nishiyama K., Pagel B. E., Planesas P., Puxley P. J., R. C. Kennicutt, Sage L. J., Sage L. J., Shioya Y., Sofue Y., Strong A. W., Tacconi L. J., Valentijn E. A., Voit G. M., Wiklind T., Wilgenbus D.   +48 more
core   +4 more sources

Dynamic Testing of Cold Gas Sprayed Bipolar Plates–Porous Transport Layer Coating System in Proton Exchange Membrane Water Electrolysis

Advanced Engineering Materials, EarlyView.
Through direct application of porous transport layer (PTL) on the bipolar plate (BPP) with thermal spraying, the interfacial contact resistance is improved. With the cold gas sprayed BPP–PTL coating system, a proton exchange membrane water electrolysis cell with a cell voltage of Ucell = 1.9 V can be operated up to i = 2.5 A/cm2 in a dynamic mode ...
Kirsten Bobzin, Marvin Erck, Kevin Jasutyn, Katja Radermacher, Andreas Bund, Mario Kurniawan   +5 more
wiley   +1 more source

Infrared spectra of the cluster ions H7O ⁺ ₃·H2 and H9O ⁺ ₄·H2 [PDF]

, 1986
Infrared spectra of hydrated hydronium ions weakly bound to an H2 molecule, specifically H7O + 3 ·H2 and H9O + 4 ·H2, have been observed. Mass-selected parent ions, trapped in a radio frequency ion trap, are excited by a tunable infrared laser; following
Lee, Y. T., Myers, J. D., Okumura, M., Yeh, L. I.   +3 more
core  

HST NICMOS Images of the HH 7/11 Outflow in NGC1333

, 2002
We present near infrared images in H2 at 2.12um of the HH 7/11 outflow and its driving source SVS 13 taken with HST NICMOS 2 camera, as well as archival Ha and [SII] optical images obtained with the WFPC2 camera.
A. Cotera, A. Noriega‐Crespo, Aspin C., Bachiller R., Bachiller R., Dougados C., E. Young, Gredel R., H. Chen, Knee L. B. G., Lavalley C., Lavalley-Fouquet C., Liseau R., Molinari S., Raga A. C., Smith M. D., Smith M. D., Smith M. D., Suttner G.   +18 more
core   +1 more source

Infrared Studies of Molecular Shocks in the Supernova Remnant HB21: I. Thermal Admixture of Shocked H_2 Gas in the North [PDF]

, 2008
We present near- and mid-infrared observations on the shock-cloud interaction region in the northern part of the supernova remnant HB21, performed with the InfraRed Camera (IRC) aboard AKARI satellite and the Wide InfraRed Camera (WIRC) at the Palomar 5 ...
Bon-Chul Koo, Burton, Burton, Byun, Cesarsky, Chevalier, Dae-Sik Moon, Dalgarno, Flower, Ho-Gyu Lee, Hollenbach, Jong-Ho Shinn, Joye, Kawada, Koo, Koo, Lazendic, Leahy, Leahy, Lee, Lorente, Mac Low, Michael G. Burton, Moorhouse, Murakami, Nakamura, Neufeld, Neufeld, Neufeld, Neufeld, Oliva, Onaka ., Patnaude, Raymond, Reach, Reynoso, Rho, Rho, Richter, Shin, Shinn, Skrutskie ., Smith, Tatematsu, Timmermann, Wardle, Weingartner, Wilgenbus   +47 more
core   +1 more source

Dielectric Barrier Discharge Plasma Deoxidation of Natively Oxide Layer of Copper Powders in a Fluidized Bed

Advanced Engineering Materials, EarlyView.
This paper presents a novel approach to reducing oxide layers on metal powders using low‐temperature hydrogen dielectric barrier discharge plasmas at atmospheric pressure. Unlike conventional hydrogen‐plasma reductions, the powders do not contact the plasma directly.
Shukang Zhang, Annett Wollmann, Thomas Gimpel, Alfred P. Weber   +3 more
wiley   +1 more source