Comparing depth profiling of oxide scale on SOFC interconnect-materials using ToF-SIMS with Ga-69(+), Bi-3(+)/Cs+ and C-60(+)/C-60(2+) as primary and sputter ions
Journal article, 2015

Oxide scale cross-sections of CeO2 coated FeCr based solid oxide fuel cell interconnect materials were examined using secondary ion mass spectrometry (SIMS) depth profiling. A duplex spinel : chromia scale was formed after 1 h at 850 degrees C. Ti and ceria were observed between these layers. Additionally, minor concentrations of Mn, Si and Nb were observed at the oxide/ metal interface. Furthermore, Al and Ti were concentrated primarily in the metal surface close to the oxide/metal interface. Secondary ion mass spectrometry sputter depth profiles using different ion sources; Ga-69(+), Bi-3(+)/Cs+ and C-60(+)/C(60)(2+)were compared with TEM oxide scale cross-section and field emission gun-Auger electron spectroscopy depth profiling. Secondary ion mass spectrometry depth profiling with Ga-69(+), Bi(3)z/Cs+ showed decreased secondary ion yields in the metallic matrix. This decrease could be avoided using oxygen flooding. The C-60 cluster ion depth profiles were less sensitive to type of matrix and gave the best correspondence to the TEM cross-section. However, the impact energy has to be high enough to avoid carbon deposition.

Oxide scale

Depth profiling

Secondary ion mass spectrometry

Solid oxide fuel cell

Author

Josefin Hall

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

U. Bexell

Dalarna university

John Fletcher

University of Gothenburg

Sead Canovic

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

Per Malmberg

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

University of Gothenburg

Materials at High Temperatures

0960-3409 (ISSN)

Vol. 32 1-2 133-141

Subject Categories

Materials Engineering

Chemical Engineering

DOI

10.1179/0960340914z.00000000089

More information

Latest update

4/1/2019 9