Early stages of high-temperature oxidation of Ni- and Co-base model superalloys: A comparative study using rapid thermal annealing and advanced electron microscopy

Kubacka D, Weiser M, Spiecker E (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Corrosion Science Elsevier

Book Volume: 191

Article Number: 109744

DOI: 10.1016/j.corsci.2021.109744

Abstract

A novel approach based on rapid thermal annealing and advanced electron microscopy is used to elucidate the differences in early stages of high-temperature oxidation of Ni- and Co-base superalloys at 900 °C. STEM-EDX results obtained for two model superalloys with exactly the same alloying additions demonstrate the individual role of the γ and γ’ phase during initial oxidation. Observed differences in Al2O3 formation can be directly correlated to changes in the partitioning behavior and the type of defects introduced during oxidation, depending on the base element. Explanations for the worse oxidation resistance of γ’-strengthened Co-base superalloys are proposed.

Authors with CRIS profile

Dorota Kubacka Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Martin Weiser Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) Erdmann Spiecker Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)

Additional Organisation(s)

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

Related research project(s)

High resolution transmission electron microscopy investigation of the atomic structure of defects and interfaces in single crystal superalloys (A07) (TRR 103) TRR 103: Vom Atom zur Turbinenschaufel - wissenschaftliche Grundlagen für eine neue Generation einkristalliner Superlegierungen Jan. 1, 2012 - Jan. 1, 2015

How to cite

APA:

Kubacka, D., Weiser, M., & Spiecker, E. (2021). Early stages of high-temperature oxidation of Ni- and Co-base model superalloys: A comparative study using rapid thermal annealing and advanced electron microscopy. Corrosion Science, 191. https://dx.doi.org/10.1016/j.corsci.2021.109744

MLA:

Kubacka, Dorota, Martin Weiser, and Erdmann Spiecker. "Early stages of high-temperature oxidation of Ni- and Co-base model superalloys: A comparative study using rapid thermal annealing and advanced electron microscopy." Corrosion Science 191 (2021).

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