Affiliation:
1. Chalmers University of Technology
2. Sandvik Materials Technology AB
3. Chalmers University of Technology and Göteborg University
Abstract
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.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Cited by
2 articles.
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