Paper Title:
A Thermodynamic Approach of the Mechano-Chemical Coupling during the Oxidation of Uranium Dioxide
  Abstract

The aim of the present work is to introduce a thermodynamic model to describe the growth of an oxide layer on a metallic substrate. More precisely, this paper offers a study of oxygen dissolution into a solid, and its consequences on the apparition of mechanical stresses. They strongly influence the oxidation processes and may be, in some materials, responsible for cracking. To realize this study, mechanical considerations are introduced into the classical diffusion laws. Simulations were made for the particular case of uranium dioxide, which undergoes the chemical fragmentation. According to our simulations, the hypothesis of a compression stress field into the oxidised UO2 compound near the internal interface is consistent with the interpretation of the mechanisms of oxidation observed experimentally.

  Info
Periodical
Defect and Diffusion Forum (Volumes 289-292)
Edited by
A. Agüero, J.M. Albella, M.P. Hierro, J. Phillibert and F.J. Pérez Trujillo
Pages
447-454
DOI
10.4028/www.scientific.net/DDF.289-292.447
Citation
N. Creton, V. Optasanu, T. Montesin, S. Garruchet, L. Desgranges, "A Thermodynamic Approach of the Mechano-Chemical Coupling during the Oxidation of Uranium Dioxide", Defect and Diffusion Forum, Vols. 289-292, pp. 447-454, 2009
Online since
April 2009
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: Eugen Rabkin, Leonid M. Klinger
Abstract:We considered the flattening of perturbed surface of a thin stress-free polycrystalline film with columnar microstructure deposited on rigid...
524
Authors: Haruki Ryoken, Isao Sakaguchi, Naoki Ohashi, Yutaka Adachi, Takeshi Ohgaki, Shunichi Hishita, Hajime Haneda
Abstract:The defect structure of undoped ZnO and (Zn1-x,Mgx)O solid-solution films were deposited on YSZ substrate with pulsed laser deposition (PLD)...
103
Authors: D. Schlehuber, Egbert Wessel, Lorenz Singheiser, T. Markus
Abstract:One possibility to run a zero CO2-emission power plant is the oxyfuel combustion process. An efficient technology to separate oxygen from air...
551
Authors: Wakako Araki, Yoshio Arai
Abstract:The oxygen diffusion in 4, 8, and 14 mol%-yttria-stabilized zirconia subjected to uniaxial stresses in the [100], [110], and [111] directions...
989
Authors: Antônio Claret Soares Sabioni, Emiliane Advíncula Malheiros, Vincent Ji, François Jomard
Chapter 6: Diffusion and Corrosion Processes
Abstract:In order to investigate the role of oxygen diffusion in the oxidation process of the AISI 439 ferritic stainless steel, oxygen ion diffusion...
339