Buscar
Mostrando ítems 41-50 de 364
Correlation between ionic radius and cation diffusion in stabilised zirconia
(Elsevier Science, 2004-09)
To get an insight into the mechanism of cation diffusion in stabilized zirconia, the diffusion of all stable lanthanides was measured simultaneously in zirconia stabilised with scandia (ScSZ), yttria (YSZ) and calcia (CSZ). ...
From diffusion experiments to mean-field theory simulations and back
(IOP Publishing, 2019-11)
Using previous experimental data of diffusion in metallic alloys, we obtain real values for an interpolation parameter introduced in a mean-field theory for diffusion with interaction. Values of order one were found as ...
Modeling of cation diffusion in oxygen ion conductors using molecular dynamics
(Elsevier Science, 2004-11)
Cation diffusion in ionic conducting oxides is modelled using molecular dynamics (MD). As example systems LSGM (Sr- and Mg-doped LaGaO3; perovskite structure) and YSZ (Y-doped ZrO2; fluorite structure) were investigated. ...
Diffusion of adsorbates on single crystal surfaces of square symmetry: Finite-size scaling and the thermodynamic limit
(Royal Society of Chemistry, 2002-12)
We investigate the influence of different diffusion mechanisms on the finite-size scaling behavior of the tracer surface diffusion coefficient in the close vicinity of a second order phase transition. A given diffusion ...
Liquid-liquid limited-supply diffusion studies in the polystyrene- poly(vinyl methyl ether) pair
(American Chemical Society, 2004-06-02)
Liquid-liquid diffusion at the interphase between poly(vinyl-methyl ether) (PVME) and polystyrene (PS) was experimentally studied using confocal Raman microspectroscopy. A combination of a specially designed experimental ...
Shannon entropy diffusion estimates: Sensitivity on the parameters of the method
(Springer, 2021-02-17)
In the present effort, we revisit the Shannon entropy approach for the study of both the extent and the rate of diffusion in a given dynamical system. In particular, we provide a theoretical and numerical study of the ...
Non-stochastic behavior of atomic surface diffusion at all temperatures
(American Physical Society, 2004-12)
Atomic diffusion is usually understood as a succession of random, independent displacements of an adatom over the surface's potential energy landscape. Nevertheless, an analysis of molecular dynamics simulations of ...
Application of the film-pore diffusion model to the sorption of phenol onto activated carbons prepared from peanut shells
(SAGE Publications, 2008-11-01)
In this work, the film-pore diffusion model was applied to the adsorption of phenol onto peanut shell activated carbon in a batch stirred vessel. This two-resistance model was applied to predict the phenol concentration ...
Analysis of erbium diffusion in zirconium-niobium alloys using neutron imaging and laser-induced breakdown spectroscopy
(Elsevier Science, 2021-06)
Due to its high neutron absorption, Erbium can be incorporated as a burnable poison in a proposed three layered fuel cladding made of zirconium alloys. Control of Er diffusion between the different layers is important to ...
Hindered cytoplasmic diffusion of inositol trisphosphate restricts its cellular range of action
(American Association for the Advancement of Science, 2016-11)
The range of action of intracellular messengers is determined by their rates of diffusion and degradation. Previous measurements in oocyte cytoplasmic extracts indicated that the Ca2+-liberating secondmessenger inositol ...