A theory of diffusion in the ordered alloy III. Chemical diffusion

1996 ◽  
Vol 73 (6) ◽  
pp. 1699-1713 ◽  
Author(s):  
I. V. Belova ◽  
G. E. Murch
Keyword(s):  
Chemical Diffusion

Host element chemical diffusion studies in high-purity Fe-Cr-Al model alloys

2003 ◽  
Vol 91 (7-8-9) ◽  
pp. 87-91
Author(s):  
P. Dawah Tankeu ◽  
A. Gruzdeva ◽  
M. Zapukhlyak ◽  
L. Doerrer ◽  
K. Goemann ◽  
...  
Keyword(s):  
High Purity ◽  
Chemical Diffusion ◽  
Diffusion Studies

scholarly journals Boundary layer analysis for a 2-D Keller-Segel model

2020 ◽  
Vol 18 (1) ◽  
pp. 1895-1914
Author(s):  
Linlin Meng ◽  
Wen-Qing Xu ◽  
Shu Wang
Keyword(s):  
Boundary Layer ◽  
Diffusion Coefficient ◽  
Approximate Solution ◽  
Chemical Diffusion ◽  
Singular Perturbation Theory ◽  
Energy Estimates ◽  
Chemical Diffusion Coefficient ◽  
Boundary Layer Problem ◽  
Classical Energy ◽  
Layer Analysis

Abstract We study the boundary layer problem of a Keller-Segel model in a domain of two space dimensions with vanishing chemical diffusion coefficient. By using the method of matched asymptotic expansions of singular perturbation theory, we construct an accurate approximate solution which incorporates the effects of boundary layers and then use the classical energy estimates to prove the structural stability of the approximate solution as the chemical diffusion coefficient tends to zero.

Magnesium isotope fractionation by chemical diffusion in natural settings and in laboratory analogues

2012 ◽  
Vol 88 ◽  
pp. 1-18 ◽  
Author(s):  
Rahul Chopra ◽  
Frank M. Richter ◽  
E. Bruce Watson ◽  
Christian R. Scullard
Keyword(s):  
Isotope Fractionation ◽  
Chemical Diffusion ◽  
Magnesium Isotope ◽  
Natural Settings

Ionic conductivity and chemical diffusion in superionic LixCu2−xS (0≤x≤ 0.25)

2004 ◽  
Vol 241 (1) ◽  
pp. 114-119 ◽  
Author(s):  
M. Kh. Balapanov ◽  
I. G. Gafurov ◽  
U. Kh. Mukhamed'yanov ◽  
R. A. Yakshibaev ◽  
R. Kh. Ishembetov
Keyword(s):  
Ionic Conductivity ◽  
Chemical Diffusion

Experimental determination of chemical diffusion within secondary organic aerosol particles

2013 ◽  
Vol 15 (8) ◽  
pp. 2983 ◽  
Author(s):  
Evan Abramson ◽  
Dan Imre ◽  
Josef Beránek ◽  
Jacqueline Wilson ◽  
Alla Zelenyuk
Keyword(s):  
Experimental Determination ◽  
Secondary Organic Aerosol ◽  
Aerosol Particles ◽  
Chemical Diffusion ◽  
Organic Aerosol

Atomic Diffusion and its Relation to Thermodynamic Forces in Al-Ni Melts

2009 ◽  
Vol 289-292 ◽  
pp. 705-710 ◽  
Author(s):  
Axel Griesche ◽  
Bo Zhang ◽  
Jürgen Horbach ◽  
Andreas Meyer
Keyword(s):  
Chemical Diffusion ◽  
Atomic Diffusion ◽  
Dynamic Simulations ◽  
X Ray ◽  
Self Diffusion ◽  
Ni Alloys ◽  
Quasielastic Neutron ◽  
Cross Correlations ◽  
Quasielastic Neutron Scattering ◽  
Thermodynamic Forces

We make use of a novel X-ray radiography method to measure chemical diffusion in capillaries in binary Al-Ni melts. Data are compared to self diffusion coefficients of Ni obtained by quasielastic neutron scattering as well as diffusion and thermodynamic data obtained by molecular dynamic simulations. Interdiffusion compared to self diffusion is enhanced with a maximum at Al40Ni60. We show that this enhancement is caused by thermodynamic forces as described by the Darken-Manning equation. In liquid Al-Ni alloys the Manning factor that is smaller than one can be attributed to collective cross correlations.

Sign in / Sign up

Export Citation Format

Share Document