Influence of the kinetic demixing of cations on ceramic ageing and alloy corrosion
Résumé
This paper concerns the kinetic demixing of cations in semiconducting oxides. From the general equations of matter transport, time-dependent cation redistributions are given for (Co, Mg)O and (Fe, Cr)O solid solutions for which thermodynamical and kinetic data are available. The cation kinetic demixing effects on the reaction rates are described. The conclusions are used to analyse the behavior of (Fe, Cr)O solid solutions under a chemical potential gradient and the effect of Cr on the internal oxidation of Ni-Cr alloys.
Domaines
Articles anciensOrigine | Accord explicite pour ce dépôt |
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