An Improved Mesoscopic Oxidation Model of Metals in Lead Bismuth Eutectic

Document Type

Article

Publication Date

8-2008

Publication Title

Computational Materials Science

Volume

43

Issue

2

First page number:

251

Last page number:

267

Abstract

The oxidation process of metals in lead bismuth eutectic (LBE) environment is studied at a mesoscopic scale. An improved stochastic cellular automaton model based on an improved Moore neighborhood is proposed to investigate the development of a continuous oxide layer of metals in LBE. The ionization of metal and the oxidation reaction were simulated with consideration of the transport of oxygen along the grain boundaries and the diffusion of metallic ions. The growth of oxide layer in two directions is observed and the volume expansion effect can be realized by changing the volume control parameter. The model was benchmarked with a diffusion process, both with the analytical solution and with the previous work. Significant agreement was reached between the data. The developed model is also mapped with the experimental data from an LBE loop. A parametric study was conducted in order to check the importance of the main explicit parameters of the mesoscopic model.

Keywords

Cellular automata; Cellular automaton; Eutectics; Lead Bismuth; Lead bismuth eutectic; Mesoscopic; Model; Oxidation

Disciplines

Materials Science and Engineering | Mechanical Engineering | Nuclear Engineering

Language

English

Permissions

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