Oxidation of β‐FeAl and Fe‐Al Alloys

Oxidation resistance of Fe–25Al–2Ta (at.%) in air

“…However, those alloys still show the formation of protective Al 2 O 3 scales at temperatures above 800 C [11,20,21], whereas at these temperatures the scale on Fee25Ale2Ta cracks and is not any longer protective.…”

Microstructural Evolution of Slurry Fe Aluminide Coatings during High Temperature Steam Oxidation

“…Results obtained both at the laboratory scale [2] as well as at field testing [3] at 650º C have shown that these coatings exhibit high resistance to steam oxidation for very long periods of time. Iron aluminides are well known for their excellent high temperature oxidation and sulfidation resistance [4][5][6] and low volatility in water containing atmospheres [7]. Diffusion iron aluminide coatings have also been deposited on various steels by chemical vapour deposition (CVD) [8][9][10], pack cementation [11,12] and hot-dipping [13].…”

The isothermal oxidation of Fe3Al−4%Cr−(0, 0.5, 1, 2%)Mo alloys at 1000°C

“…3(a). Areas where complete spalling occurred revealed interfacial pores owing to Aldepletion on the metal surface, which would deteriorate scale adherence [11]. The concentration profiles shown in Fig.…”

“…Strong Fe 3 Al matrix peaks were observed due to thin scale formation and/or the exposure of a fresh surface owing to scale spallation. It is known that metastable, transient θ-*Corresponding author: dlee@yurim.skku.ac.kr Al 2 O 3 transforms to a highly stoichiometric, slowly growing α-Al 2 O 3 after some hours during the oxidation of Fe-aluminides between 800~1000 o C [11]. Fig.…”

“…Chromium was detected at spots 6 and 8-14, whereas Mo at spots 10-14. The contamination of foreign cations such as Fe, Cr, and Mo, in the alumina grains that formed on the Fe 3 Al-4Cr-Mo alloys would increase the oxidation rates when compared to the pure α-Al 2 O 3 -forming kinetics on pure FeAl [9,11]. As in Fig.…”