Results 31 to 40 of about 4,565,563 (306)

Water formation on bare grains: When the chemistry on dust impacts interstellar gas [PDF]

, 2010
Context. Water together with O2 are important gas phase ingredients to cool dense gas in order to form stars. On dust grains, H2 O is an important constituent of the icy mantle in which a complex chemistry is taking place, as revealed by hot core ...
Akai, Andersson, Andersson, Bachellerie, Bergeron, Bergin, Bolina, Brown, Caselli, Cazaux, Cazaux, Cazaux, Chang, Cuppen, Cuppen, D’Hendecourt, Fromherz, Garrod, Ghio, Gibb, Goldsmith, González, Hasegawa, Heine, Hollenbach, Hollenbach, Ioppolo, Jelea, Jeloaica, Jones, Jones, Katz, Lee, Lee, Lin, M. Marseille, M. Spaans, Meijerink, Miyauchi, Mokrane, Neufeld, Oberg, P. Caselli, Papoular, Pirronello, Rougeau, S. Cazaux, Sha, Snow, Tielens, V. Cobut, Walch, Whittet, Williams   +53 more
core   +4 more sources

Gas Phase Formation of Methylgermylene (HGeCH3)

ChemPhysChem, 2020
AbstractThe methylgermylene species (HGeCH3; X1A′) has been synthesized via the bimolecular gas phase reaction of ground state methylidyne radicals (CH) with germane (GeH4) under single collision conditions in crossed molecular beams experiments. Augmented by electronic structure calculations, this elementary reaction was found to proceed through ...
Zhenghai Yang, Chao He, Srinivas Doddipatla, Vladislav S. Krasnoukhov, Valeriy N. Azyazov, Alexander M. Mebel, Ralf I. Kaiser   +6 more
openaire   +3 more sources

Phase and morphology evolution of (Na1-xKx)NbO3 powders related to calcinations and K2CO3 content [PDF]

Songklanakarin Journal of Science and Technology (SJST), 2007
Sodium-potassium niobate ((Na1-xKx)NbO3) powders with x = 0.2, 0.4, 0.6 and 0.8 were prepared following the conventional mixed oxide method and characterized by TG-DTA, XRD and SEM techniques.The effects of calcination temperature, dwell time and K2CO3 ...
Steven J. Milne, Winai Saengchote, Supasarote Muensit, Pornsuda Bomlai   +3 more
doaj  

Influence of the parameters of thermal decomposition of ammonium tetravanadate on the processes of phase formation of highly dispersed vanadium oxides. [PDF]

Trudy Odesskogo Politehničeskogo Universiteta, 2018
The peculiarities of the thermal decomposition of the highly dispersed vanadium (IV) ammonium tetrabutanate salt, which is a precursor for the production of nanocrystalline vanadium oxides of different degrees of oxidation (V2O5, VO2), are studied.
Luskan К. , Gyrenko А. , Musov О. , Savchenko Мaria , Klimenko О.   +4 more
doaj   +1 more source

Towards a Sustainable Laser Powder Bed Fusion Process via the Characterisation of Additively Manufactured Nitinol Parts

Designs
Is additive manufacturing (AM) a sustainable process? Can the process be optimised to produce sustainable AM parts and production techniques? Additive manufacturing offers the production of parts made of different types of materials in addition to the ...
Muhannad Ahmed Obeidi, Paul Healy, Hasan Alobaidi, Declan Bourke, Dermot Brabazon   +4 more
doaj   +1 more source

Formation energy in \sigma-phase Fe-V alloys

, 2012
Formation energy of the \sigma-phase in the Fe-V alloy system, \Delta E, was computed in the full compositional range of its occurrence (34 < x < 60) using the electronic band structure calculations by means of the KKR method.
Cieslak, J., Dubiel, S. M., Tobola, J.
core   +1 more source

Fragmentation at the Earliest Phase of Massive Star Formation [PDF]

, 2009
We present 1.3mm continuum and spectral line images of two massive molecular clumps P1 and P2 in the G28.34+0.06 region with the Submillimeter Array. While the two clumps contain masses of 1000 and 880 \msun, respectively, P1 has a luminosity $< 10^2 ...
Pillai, Thushara, Rathborne, Jill, Wang, Yang, Zhang, Qizhou   +3 more
core   +1 more source

Entropy-driven formation of the gyroid cubic phase [PDF]

, 2006
We show, by computer simulation, that tapered or pear-shaped particles, interacting through purely repulsive interactions, can freely self-assemble to form the three-dimensionally periodic, gyroid cubic phase.
D. J. Cleaver, D. J. Michel, F. Barmes, J. M. Seddon, L. J. Ellison, L. Onsager, S.-J. Marink   +6 more
core   +1 more source

Investigation of the chemical interaction in the TiC-Si3N4 system [PDF]

Materials Research, 1999
Chemical interaction in the TiCSi3N4 system was investigated. Thermodynamic calculations and kinetic analysis were carried out for a number of powder mixtures with various TiC:Si3N4 molar ratios in the temperature range 1300-1750 °C. Stability regions of
V.A. Izhevskyi, L.A. Genova, J.C. Bressiani   +2 more
doaj   +1 more source

Phase separation and the segregation principle in the infinite-U spinless Falicov-Kimball model [PDF]

, 1999
The simplest statistical-mechanical model of crystalline formation (or alloy formation) that includes electronic degrees of freedom is solved exactly in the limit of large spatial dimensions and infinite interaction strength.
A. Georges, B. M. Letfulov, C. Borgs, Ch. Gruber, Ch. Gruber, Ch. Gruber, J. K. Freericks, J. K. Freericks, J. K. Freericks, J. K. Freericks, L. M. Falicov, L. Onsager, M. H. Hettler, N. Datta, N. Macris, O. Zahar, P. G. J. van Dongen, P. G. J. van Dongen, P. G. J. van Dongen, P. Lemberger, R. Ramirez, S. R. White, S. R. White, T. D. Lee, T. Kennedy, U. Brandt, U. Brandt, U. Brandt, U. Brandt, W. Metzner   +29 more
core   +1 more source