Coupling between Diffusion, Stress Field and Chemical Reaction in a Metal-Gas Oxidation

Sallès-Desvignes, Isabelle; Bertrand, Gilles; Montésin, Tony; Favergeon, Jérôme

doi:10.4028/www.scientific.net/ssp.72.9

Cited by 7 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…25 The first results obtained with this model have shown the great influence of epitaxial strains developed at the metal/oxide interface on the zirconium oxidation kinetics. 25,26 It was also shown that stresses develop in the metal because of oxygen dissolution; taking into account such stresses was proven to be important in order to perform mechanical calculations on the whole system, particularly when oxidation temperature is above 773 K. So in order to develop the knowledge about the influence of stresses in the metal, we chose to work at 873 K and the first part of this paper will be dedicated to stress/diffusion coupling applied to oxygen diffusion in zirconium alloys, with particular efforts to account for mechanical anisotropy. The second part presents oxide growth simulations performed with particular hypotheses, which allow to study the competitive behavior between oxygen dissolution in the metal and oxidation rate.…”

Section: Introductionmentioning

confidence: 97%

Mechano-Chemical Aspects of High Temperature Oxidation: A Mesoscopic Model Applied to Zirconium Alloys

2005

View full text Add to dashboard Cite

A model is developed in order to study the influence of mechanical aspects during high temperature oxidation of zirconium alloys. This model accounts for oxygen diffusion within the metal and across the oxide scale. Much attention is paid on the role of the Zr-O solid solution on oxidation kinetics and on the role of mechanical anisotropy. The model shows that stresses developed in the metal, due to oxygen dissolution, have a strong influence on oxidation rates. In particular, a change of crystallographic orientation of the metal leads to a change in stress gradients which is responsible for differences in oxidation rates. Such results are confirmed by experimental results.

show abstract

Section: Introductionmentioning

confidence: 97%