Paper Title:
On the Physics of the Anomalous Characteristics of Fickian Diffusion of Fe and Other Transition-Element Impurities in Crystalline Al at Elevated Temperatures
  Abstract

As the critical constructive analysis, with using the thermodynamic and crystal-chemical approaches, of the related experimental data is shown, the anomalous (with respect to the Al selfdiffusion characteristics (DAl - the self-diffusion coefficient, D0Al - the entropy (frequency) factor of the self-diffusion coefficient, QAl – the self-diffusion activation energy (enthalpy)) quantities of D*, D0*, Q* of the transition impurity Fickian diffusion in Al in many cases can be of the apparent character (related to the known Oriani model), whereas the normal quantities of D, D0, Q (i.e., close to DAl, D0Al, QAl), and the anomalously low quantities of D⊥, Q⊥, D0⊥ can be as the true characteristics of the impurity Fickian diffusion in the normal Al lattice (bulk) and in the compound-like nanosegregation (CLNS) structures at dislocations, respectively.

  Info
Periodical
Defect and Diffusion Forum (Volumes 251-252)
Edited by
David J. Fisher
Pages
111-122
DOI
10.4028/www.scientific.net/DDF.251-252.111
Citation
Y. S. Nechaev, "On the Physics of the Anomalous Characteristics of Fickian Diffusion of Fe and Other Transition-Element Impurities in Crystalline Al at Elevated Temperatures", Defect and Diffusion Forum, Vols. 251-252, pp. 111-122, 2006
Online since
March 2006
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Antônio Claret Soares Sabioni, Anne Marie Huntz, F. Silva, François Jomard
Abstract:Chromia protective layers are used to prevent corrosion by oxidation of many alloys, such as the stainless steels, for instance. To check if...
940
Authors: Vladimir V. Popov
Abstract:Possibilities of grain-boundary diffusion and segregation studies using nuclear gammaresonance spectroscopy (NGR) are considered. It is...
497
Authors: Sergiy V. Divinski, Boris S. Bokstein
Abstract:Some unresolved problems of grain boundary diffusion – restrictions of Fisher-Gibbs model, refinement of the conditions for B- and C-regimes,...
1
Authors: D. Prokoshkina, A.O. Rodin, V. Esin
Chapter 3: Nanomaterials and Grain Boundaries
Abstract:The temperature dependence of the bulk diffusion coefficient of Fe in Cu is determined by EDX in the temperature range from 923 to 1273 K, ,...
171