Cyclic oxidation of two FeCrAlRE foils at 1100 oC - The influence of the concentration of minor alloying elements on scale microstructure
Paper in proceedings, 2008

Two FeCrAlRE alloys, a commercial, 0C404, and a model alloy in the form of thin foils, with different Mn, Nb, Mo and Ti concentrations were subjected to cyclic oxidation in lab air at 1100°C. The oxidized samples were studied by gravimetry, Grazing-Incidence X-ray Diffraction (GI-XRD), Scanning Transmission Electron Microscopy (STEM), and Energy Dispersive X-ray (EDX) analysis. The two FeCrAl alloys exhibit different oxidation kinetics; however, both alloys have the same weight gain after 500 hours exposure. During the early stages the scale consists mainly of α-Al2O3 together with some oxide particles containing Mn, Al, Fe and Cr formed on the alloys. After 500 hours the 0C404 scale locally also consists of larger polycrystalline regions of Mn-Cr-Al spinel. In addition, Si-rich oxide, chromia and Al-Cr oxide could be observed at the metal/oxide interface.

Author

Fang Liu

Chalmers, Applied Physics, Microscopy and Microanalysis

Mikael Götlind

Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry

Sead Canovic

Chalmers, Applied Physics, Microscopy and Microanalysis

Haiping Lai

Chalmers, Applied Physics, Microscopy and Microanalysis

J. Westlinder

Sandvik

Andreas Rosberg

Sandvik

Jan-Erik Svensson

Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry

Lars-Gunnar Johansson

Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry

Mats Halvarsson

Chalmers, Applied Physics, Microscopy and Microanalysis

Materials Science Forum

0255-5476 (ISSN)

Vol. 595-598 707-716

Subject Categories

Other Materials Engineering

ISBN

977-025554760-5

More information

Latest update

5/30/2018