Atom probe tomography of thermally grown oxide scale on FeCrAl
Journal article, 2013

Thermally grown Al2O3 scales formed on a FeCrAl alloy were successfully analyzed using pulsed green laser atom probe tomography. Two types of atom probe tomography specimens, the “thin oxide” type: a thin Al2O3 layer (<100 nm) with underlying metal (1 μm), and the “thick oxide” type: only with Al2O3 (1 μm), were prepared and analyzed. It was found that the thin oxide type yields poorer mass resolution due to a combined effect of laser absorption and thermal conduction effects. Application of a relatively low laser energy yields a better mass resolution and increased multiple events, however, more exact quantification results. Although no other oxide phase than Al2O3 is expected to form, some iron-oxygen and chromium-oxygen molecular ions were recorded at the Al2O3/metal interface due to the large change in evaporation field over this zone.

Author

Fang Liu

Chalmers, Applied Physics, Materials Microstructure

Krystyna Marta Stiller

Chalmers, Applied Physics, Materials Microstructure

Ultramicroscopy

0304-3991 (ISSN)

Areas of Advance

Energy

Materials Science

Subject Categories

Other Materials Engineering

More information

Created

10/6/2017