Hudak, O. E., Scheiber, A., Kutrowatz, P., Wojcik, T., Shang, L., Hunold, O., Kolozsvári, S., Polcik, P., & Riedl-Tragenreif, H. (2023). Low-temperature hot corrosion of arc evaporated Ti₁−ₓAlₓN on Ni-Cr-Co based superalloys. Corrosion Science, 224, Article 111565. https://doi.org/10.1016/j.corsci.2023.111565
Arc-evaporation; Low temperature hot corrosion; PVD coatings; Superalloy
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Abstract:
Cathodic arc evaporated Ti₁−ₓAlₓN coatings were deposited on a Nimonic c-263 superalloy and tested under low temperature hot corrosion conditions. Treated with a MgSO₄/Na₂SO₄ salt-mixture, all samples were annealed at 700 °C in a 2800 ppm(volume) SOₓ-rich atmosphere for 1, 5, 15 and 30 h. A significantly reduced corrosion severity was exhibited by all Ti₁−ₓAlₓN variants over the uncoated NiCrCo alloy. A synergistic fluxing mechanism was found to be the dominant factor for the coating breakdown. Depending on the relative Al-to-Ti content on the Ti₁−ₓAlₓN sublattice, differences in the coatings’ corrosion and scaling behavior were observed.
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Research facilities:
Röntgenzentrum Universitäre Service-Einrichtung für Transmissionselektronenmikroskopie
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Project title:
Oberflächentechnik von hochbeanspruchten Präzisionskomponenten: CDL-SEC (Christian Doppler Forschungsgesells)
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Research Areas:
Metallic Materials: 30% Surfaces and Interfaces: 40% Non-metallic Materials: 30%
CC BY 4.0
