CATION REDISTRIBUTION IN OXIDES UNDER OXYGEN POTENTIAL GRADIENTS - INFLUENCE ON THE CORROSION KINETICS

被引：11
|
作者：
PETOTERVAS, G [1 ]
PETOT, C [1 ]
MONCEAU, D [1 ]
LOUDJANI, M [1 ]
机构：
[1] UNIV PARIS 11, LMS, ISMA, F-91405 ORSAY, FRANCE
来源：
SOLID STATE IONICS | 1992年 / 53卷 / pt 1期
关键词：
D O I：
10.1016/0167-2738(92)90390-B
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A formal analysis is given of the kinetic demixing effects in multicomponent semiconducting oxides within their range of stability. We have shown that the relative diffusion coefficient values of the cationic species control the shift velocity of the oxidation or reduction front in the material. Calculated kinetic demixing profiles are given for (Co,Mg)O and (Fe,Cr)O solid solutions. From the theoretical and experimental results obtained it has been possible to analyse the behavior of chromium in oxide layers formed on transition metal alloys independently of all other transport processes occuring during scale thickening.
引用
收藏
页码：270 / 279
页数：10
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