Paper Title:
Intrinsic Diffusivities and Modeling of the Diffusion Multiples
  Abstract

In order to model the diffusion in multicomponent and multiphase systems we define and use the volume fixed frame of reference. In this unique frame all diffusion fluxes are expressed by the combined Darken-Nernst-Planck formulae. The components mobility is estimated using the NIST data and Calphad approach. The resulting CADiff method is used for the modeling (inter)diffusion process in the multicomponent diffusion multiple. We shows results for the IN718-Rene88 terminal compositions. Comparison of the simulation results with experimental data shows good agreement. The presented CADiff method allows to model interdiffusion in multicomponent non-ideal systems. When the thermodynamical data are available, the method allows to include reactions, variable partial molar volumes and effect of stress.

  Info
Periodical
Defect and Diffusion Forum (Volumes 273-276)
Edited by
Andreas Öchsner and Graeme E. Murch
Pages
105-112
DOI
10.4028/www.scientific.net/DDF.273-276.105
Citation
M. Danielewski, B. Wierzba, "Intrinsic Diffusivities and Modeling of the Diffusion Multiples", Defect and Diffusion Forum, Vols. 273-276, pp. 105-112, 2008
Online since
February 2008
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: Bartłomiej Wierzba, Marek Danielewski, Renata Bachorczyk Nagy, Maciej Pietrzyk
Abstract:We compare the experimental and computed results of the stress assisted interdiffusion. The Cu-Fe-Ni diffusion couples were investigated at...
47
Authors: Marek Danielewski, Bartłomiej Wierzba
Abstract:In this work we show that the volume velocity, ρυ , rather than the local centre of mass velocity should be used in continua. We use the...
61
Authors: Marek Danielewski, Bartek Wierzba
Abstract:Kirkendall and Darken findings of the drift velocity since 1948 have stimulated progress in transport phenomenological models. The convection...
1461
Authors: Marek Danielewski
Chapter 1: Diffusion Fundamentals
Abstract:A general, consistent with linear irreversible thermodynamics, theory of stress and elastic deformation during interdiffusion is shown....
43
Authors: Bartek Wierzba, Marek Danielewski, Andrzej Nowotnik, Jan Sieniawski
Abstract:In this paper we couple the bi-velocity with the phase field method. It deals with: (1) the different mobility of the components in the...
83