Kinetics of the oxidation of metals — Influence of self-diffusion of metal |
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Authors: | M M P Soustelle R L Lalauze |
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Affiliation: | (1) Laboratoire de Cinétique Hétérogène, Département de Chimie, Ecole Nationale Supérieure des Mines, Saint-Etienne, France |
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Abstract: | The importance of the self-diffusion of a metal during its oxidation by a gas is treated for the cases of nonstoichiometric oxides having either interstitial cation or cation vacancies. We have established a general relationship for the reaction rate when a mixed diffusion process occurs. From this relationship, we have shown that the pressure dependence can be different, according to whether the rate-determining process is the self-diffusion through the metal or through the product. |
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