In-Diffusion and Out-Diffusion of Oxygen from a Composite Containing Random Traps |
| Journal |
Solid State Phenomena (Volume 139) |
| Volume |
Theory, Modeling and Numerical Simulation |
| Edited by |
Veena Tikare, Graeme E. Murch, Frédéric Soisson and Jeung Ku Kang |
| Pages |
35-40 |
| DOI |
10.4028/www.scientific.net/SSP.139.35 |
| Online since |
April, 2008 |
| Authors |
Irina V. Belova,
Graeme E. Murch
|
| Keywords |
Composite, Diffusion, Lattice Monte Carlo, Segregation |
| Abstract |
In this paper, we investigate oxygen in-diffusion and out-diffusion with respect to a cermet
composite where oxygen segregates at the interface between the metal matrix phase and the
ceramic oxide phase. This phenomenological diffusion problem is treated by overlaying it with a
fine-grained lattice that was addressed using a Lattice Monte Carlo method and a little-known exact
expression for the lattice-based effective diffusivity in the presence of random traps. It is shown that
there is very good agreement for the oxygen concentration depth profiles between the Monte Carlo
results and the exact expression. |
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