Modelling of the effect of grain boundary diffusion on the oxidation of Ni-Cr alloys at high temperature

被引：30

作者：

Bataillou, Lea ^{[1
,3
]}

Desgranges, Clara ^{[1
,2
]}

Martinelli, Laure ^{[1
]}

Monceau, Daniel ^{[3
]}

机构：

[1] Univ Paris Saclay, CEA, Den Serv Corros & Comportement Mat Environm SCCME, F-91191 Gif Sur Yvette, France

[2] Safran Tech, Rue Jeunes Bois,CS 80112, F-78772 Magny Les Hameaux, France

[3] Univ Toulouse, CNRS, CIRIMAT, INPT,UPS, 4 Allee Emile Monso,BP 44362, F-33103 Toulouse 4, France

来源：

CORROSION SCIENCE | 2018年 / 136卷

关键词：

Modelling; Oxidation kinetics; Diffusion; Grain boundaries; GROWTH-MECHANISM; EXPLICIT TREATMENT; NUMERICAL-MODEL; ALUMINA SCALES; CHROMIA LAYERS; ION DIFFUSION; OXIDE SCALE; KINETICS; OXYGEN; EVOLUTION;

D O I：

10.1016/j.corsci.2018.03.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Grain boundaries In oxide scales have a strong effect on oxidation kinetics when they act as diffusion short circuits. This study proposes a quantitative evaluation of the phenomenon by modelling. Various cases of oxide microstructure evolution are treated using both analytical and numerical resolutions. Results showed that the effect of oxide grain growth on the oxidation kinetics can be analysed considering a transitory stage for which the oxidation kinetics is not purely parabolic. Some guidelines for choosing the appropriate post-treatment method for the analysis and extrapolation of experimental oxidation kinetics are given.

引用

页码：148 / 160

页数：13

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