Using Rapid Thermal Annealing for Studying Early Stages of High-Temperature Oxidation of Superalloys

Kubacka D, Eggeler Y, Volz N, Neumeier S, Spiecker E (2020)

Publication Type: Conference contribution, Conference Contribution

Subtype: other

Publication year: 2020

Publisher: Springer International Publishing

City/Town: Cham

Pages Range: 763-770-770

ISBN: 978-3-030-51834-9

DOI: 10.1007/978-3-030-51834-9_74

Abstract

The great potential of Rapid Thermal Annealing (RTA)Rapid Thermal Annealing (RTA), a widespread technique in semiconductor technology, for studying high-temperature properties of superalloys is demonstrated. As an application example, early stages of high-temperature oxidationOxidationof Co/Ni-base superalloysCo/Ni-base superalloysare investigated. Model alloys with different Co/Ni ratio are oxidized in synthetic dry air at 900 °C to understand the differences between the oxidationOxidationbehavior of Ni- and Co-base alloys. Upon short exposure times (below 64 s), the two-phase γ/γ′ microstructure has a pronounced influence on both the morphology and growth kinetics of Al2O3 precipitates. Depending on the base element, Al2O3 nucleates in either the γ′ phase in the form of needles (Ni-base superalloy) or in the γ matrix as lath- and plate-like precipitates (Co-base superalloy) with the latter showing much slower formation kinetics. Observed differences in oxidationOxidationbehavior can be directly correlated to changes in the partitioning of W, which acts as a γ former in Ni- and a γ′ former in Co-base superalloys. We propose that a significant amount of W in γ′ has an inhibitory effect on the diffusionDiffusionof Al, suppressing the formation of Al2O3 in the γ′ phase of Co-base superalloys. Our approach proved to be very successful for oxidationOxidationstudies and opens up new opportunities for superalloys research.

Authors with CRIS profile

Dorota Kubacka Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Yolita Eggeler Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Nicklas Volz Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Steffen Neumeier Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Erdmann Spiecker Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)

Additional Organisation(s)

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

Related research project(s)

B03 (FP3): Einkristalline Co-Basis Superlegierungen (SFB/TRR 103) SFB/TRR 103 Jan. 1, 2020 - Dec. 31, 2023 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., Eggeler, Y., Volz, N., Neumeier, S., & Spiecker, E. (2020). Using Rapid Thermal Annealing for Studying Early Stages of High-Temperature Oxidation of Superalloys. In Tin S, Hardy M, Clews J, Cormier J, Feng Q, Marcin J, O'Brien C, Suzuki A (Eds.), (pp. 763-770-770). Cham: Springer International Publishing.

MLA:

Kubacka, Dorota, et al. "Using Rapid Thermal Annealing for Studying Early Stages of High-Temperature Oxidation of Superalloys." Ed. Tin S, Hardy M, Clews J, Cormier J, Feng Q, Marcin J, O'Brien C, Suzuki A, Cham: Springer International Publishing, 2020. 763-770-770.

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