Thermal Alumina Scales on FeCrAl: Characterization and Growth Mechanism

Sébastien Chevalier; Alain Galerie; Olivier Heintz; Remi Chassagnon; Alexandre Crisci

doi:10.4028/www.scientific.net/MSF.595-598.915

Paper Titles

Microstructure Influence on Residual Stresses in Growing Chromia Oxide Films as Determined by In Situ High Temperature Raman Spectroscopy
p.881

High Resolution MicroRaman Study of Blisters in Cr₂O₃ Thermal Oxide Films
p.889

Yttrium Implantation and Manganese Addition Element Effects on the High Temperature Oxidation Resistance of a Model Steel
p.897

Comments on the Quantification of Mechanical Adhesion Energy of Thermal Oxide Scale on Metallic Substrate Using Tensile Test
p.907

Thermal Alumina Scales on FeCrAl: Characterization and Growth Mechanism
p.915

Relation between Synthesis Process, Microstructure and Corrosion Resistance of Two Yttrium Silicates
p.923

The Effects of Reactive Element Oxide Coatings on the High Temperature Oxidation of FeCrAl Alloy
p.933

Thermal Fatigue of Anticorrosive Coatings and Multilayer Coatings: A Performance Index Approach
p.941

Influence of Interstitials Content on the Sensitivity of Alloy 718 to Oxidation Assisted Intergranular Fracture
p.951

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Thermal Alumina Scales on FeCrAl: Characterization and Growth Mechanism

Abstract:

High temperature oxidation resistance of alumina-forming materials is connected to the growth of dense, stable and protective alumina scales. Depending on temperature, impurities present in the base alloys, presence of water vapour in the oxidizing atmosphere, the alumina scales are composed of alpha-alumina (which is the stable phase obtained for temperatures over 1000°C) or of transient alumina (γ,θ,δ obtained for lower temperatures). It is generally considered that γ- Al2O3 grows when T<850°C, that θ-Al2O3 is present for 850°C