Early stages of scale formation during oxidation of γ/γ' strengthened single crystal ternary Co-base superalloy at 900 °C

Weiser M, Eggeler Y, Spiecker E, Virtanen S (2018)

Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2018

Journal

Corrosion Science Elsevier

Publisher: Elsevier Ltd

Book Volume: 135

Pages Range: 78-86

DOI: 10.1016/j.corsci.2018.02.020

Abstract

A study on the individual role of γ and γ′-phase during the scale formation on Co-9Al-9W (at.%) at 900 °C was conducted. High-accuracy thermogravimetric analysis was used to locate changes in the kinetics of scale growth. Compositions of three separated layers within the scale have been elucidated in detail. The results demonstrate the substantial impact of the two-phase microstructure on the initiation of oxidation for the appearance of the scale. Examination of STEM-EDX elemental mappings of the internal oxidation front during the early stages of scale growth can explain the origin of isolated Al₂O₃ precipitates instead of a closed protective layer.

Authors with CRIS profile

Martin Weiser Professur für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) Yolita Eggeler Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Erdmann Spiecker Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Sannakaisa Virtanen Professur für Werkstoffwissenschaften (Korrosion und Oberflächentechnik)

Additional Organisation(s)

Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)

How to cite

APA:

Weiser, M., Eggeler, Y., Spiecker, E., & Virtanen, S. (2018). Early stages of scale formation during oxidation of γ/γ' strengthened single crystal ternary Co-base superalloy at 900 °C. Corrosion Science, 135, 78-86. https://doi.org/10.1016/j.corsci.2018.02.020

MLA:

Weiser, Martin, et al. "Early stages of scale formation during oxidation of γ/γ' strengthened single crystal ternary Co-base superalloy at 900 °C." Corrosion Science 135 (2018): 78-86.

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