Cyclic oxidation of two FeCrAlRE foils at 1100 oC - The influence of the concentration of minor alloying elements on scale microstructure
Paper i proceeding, 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.

Författare

Fang Liu

Chalmers, Teknisk fysik, Mikroskopi och mikroanalys

Mikael Götlind

Chalmers, Kemi- och bioteknik, Oorganisk miljökemi

Sead Canovic

Chalmers, Teknisk fysik, Mikroskopi och mikroanalys

Haiping Lai

Chalmers, Teknisk fysik, Mikroskopi och mikroanalys

J. Westlinder

Sandvik

Andreas Rosberg

Sandvik

Jan-Erik Svensson

Chalmers, Kemi- och bioteknik, Oorganisk miljökemi

Lars-Gunnar Johansson

Chalmers, Kemi- och bioteknik, Oorganisk miljökemi

Mats Halvarsson

Chalmers, Teknisk fysik, Mikroskopi och mikroanalys

Materials Science Forum

0255-5476 (ISSN)

Vol. 595-598 707-716

Ämneskategorier

Annan materialteknik

ISBN

977-025554760-5

Mer information

Senast uppdaterat

2018-05-30