First Three-Dimensional Atomic Resolution Investigation of Thermally Grown Oxide on a FeCrAl Alloy
Journal article, 2015

Thermally grown Al2O3 scales formed on a FeCrAl alloy, Kanthal APMT, were successfully analysed using pulsed green laser atom probe tomography. The alloy was exposed to 5 vol.% O-2 + 95 vol.% N-2 at 900 A degrees C for 1 h, and covered by a thin layer of Al2O3. Cr segregation to some of the Al2O3 grain boundaries was observed. The continuous Cr-rich band, which contains a large number of Cr- and/or Fe- enriched nano-sized particles, was studied in detail. Four types of nanoparticles were found and analysed. Oxidation mechanisms at the initial stages are discussed based on the observations.

Steel

Segregation

High temperature corrosion

Atom probe tomography

STEM

Author

Fang Liu

Chalmers, Applied Physics, Materials Microstructure

Mats Halvarsson

Chalmers, Applied Physics, Materials Microstructure

Kristina M Hellström

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Environmental Inorganic Chemistry

Jan-Erik Svensson

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Environmental Inorganic Chemistry

Lars-Gunnar Johansson

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Environmental Inorganic Chemistry

Oxidation of Metals

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

Vol. 83 5-6 441-451

Subject Categories

Metallurgy and Metallic Materials

Areas of Advance

Materials Science

DOI

10.1007/s11085-015-9530-y

More information

Created

10/8/2017