Oxidation behaviour of novel ODS FeAlCr intermetallic alloys

The Oxide Scales Formed on a Dispersion-Strengthened Powder Metallurgical FeCrAl Alloy at 900 °C in O2 and in O2 + H2O

“…Similar results were obtained with TEM and SIMS analyses for the sample exposed for 72 h in dry O 2 , published elsewhere [24]. The formation of a two-layered alumina scale containing a Cr-rich band has been reported earlier for FeCrAl alloys [13,[25][26][27][28]. In accordance with Götlind et al and Liu et al [13,17], who investigated the oxidation properties of a wrought FeCrAl alloy at 900°C, it is assumed that both iron and chromium entered the scale during transient oxidation, i.e.…”

Development of Simultaneous Corrosion Barrier and Optimized Microstructure in FeCrAl Heat-Resistant Alloy for Energy Applications. Part 1: The Protective Scale

“…18,19 The location of new oxide formation depends on the relative diffusivities of Al and O. Diffusion through this scale occurs primarily along grain boundaries. 20 Consistent with the results reported by Montealegre et al, 21 Fig. 5c shows the mass gain variation at 1100 and 900°C in air.…”

“…2c and considering average activation energy for oxygen diffusion of 320 kJ/mol. 21 This graph gives precise information on the time/temperature dependence of the oxidation reaction and, therefore, it could be useful, for instance, to determine the experimental conditions that yield a desired scale thickness.…”

Oxidation of a Dispersion-Strengthened Powder Metallurgical FeCrAl Alloy in the Presence of O2 at 1,100 °C: The Influence of Water Vapour

“…The oxidation of FeCrAl alloys [900°C has been reported to produce a protective two-layered a-Al 2 O 3 scale, the top layer being outward grown and the bottom layer being inward grown by oxygen ion diffusion [6][7][8][9][10][11][12]. In addition, the interface between the two layers has been reported to correspond to the original metal surface.…”