Hudak, O. E., Scheiber, A., Kutrowatz, P., Wojcik, T., Hahn, R., Ramm, J., Hunold, O., Kolozsvári, S., Polcik, P., & Riedl-Tragenreif, H. (2024). High-temperature hot corrosion kinetics of PVD Ti₁₋ₓAlₓN coatings on Nimonic c-263. Corrosion Science, 236, Article 112248. https://doi.org/10.1016/j.corsci.2024.112248
The high-temperature hot corrosion (HTHC) behavior of Ti₁₋ₓAlₓN-coated c-263 alloy was studied with- and without a Na₂SO₄/MgSO₄ salt mixture at 850 °C in a SOₓ-rich atmosphere. In absence of the salt deposit, both, the bare c-263 alloy and cathodic arc evaporated Ti₁₋ₓAlₓN specimens follow a quasi-cubic corrosion rate. However, when exposed to salt under identical conditions, the rates increase significantly, featuring a compounded parabolic-linear rate law for the c-263 alloy, and a parabolic-like rate behavior for Ti₁₋ₓAlₓN-coated specimens. The rate-determining step of the HTHC mechanism was attributed to a nitride-to-oxide transformation, followed by a sequential fluxing of the formed oxides.
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Forschungsinfrastruktur:
Röntgenzentrum Universitäre Service-Einrichtung für Transmissionselektronenmikroskopie
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Projekttitel:
Oberflächentechnik von hochbeanspruchten Präzisionskomponenten: CDL-SEC (Christian Doppler Forschungsgesells)
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Forschungsschwerpunkte:
Materials Characterization: 30% Surfaces and Interfaces: 30% Non-metallic Materials: 40%
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