The Oxide Scales Formed on a Dispersion-Strengthened Powder Metallurgical FeCrAl Alloy at 900 A degrees C in O-2 and in O-2 + H2O
Artikel i vetenskaplig tidskrift, 2015

Early oxide scale growth on an oxide dispersion strengthened rapidly solidified powder FeCrAl material, Kanthal(A (R)) APMT, was investigated at 900 A degrees C in an O-2 + N-2 and an O-2 + H2O + N-2 environment for up to 168 h. Gravimetry was used to follow oxide growth and the oxide scale was examined with XRD. Scale morphology was investigated in detail with SEM/EDX, TEM/EDX/CBED. The alloy rapidly formed a protective two-layered alpha-alumina scale containing oxide nodules. Between the top and bottom alumina layers there was a zone containing chromia-rich particles 5-20 nm in diameter, corresponding to the original sample surface. The alumina scale mainly grew inward after 1 h of oxidation. Alumina scale growth at 900 A degrees C was initially somewhat faster in an O-2 + H2O + N-2 environment than in an O-2 + N-2 environment.

Water vapour

FeCrAl

High-temperature oxidation

Författare

Kristina M Hellström

Chalmers, Kemi och kemiteknik, Energi och material, Oorganisk miljökemi

Niklas Israelsson

Chalmers, Kemi och kemiteknik, Energi och material, Oorganisk miljökemi

Mats Halvarsson

Chalmers, Teknisk fysik, Materialens mikrostruktur

Sead Canovic

Chalmers, Kemi och kemiteknik, Energi och material, Oorganisk miljökemi

Jan-Erik Svensson

Chalmers, Kemi och kemiteknik, Energi och material, Oorganisk miljökemi

Lars-Gunnar Johansson

Chalmers, Kemi och kemiteknik, Energi och material, Oorganisk miljökemi

Oxidation of Metals

0030-770X (ISSN) 1573-4889 (eISSN)

Vol. 84 1-2 1-19

Ämneskategorier

Metallurgi och metalliska material

DOI

10.1007/s11085-015-9538-3

Mer information

Skapat

2018-01-24