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00925njm 22002777a 4500 dc Hovsepian,P. Eh author Ehiasarian, A.P. author Purandare, Y.P. author Mayr, P. author Abstoss, K.G. author Mosquera Feijoo, M. author Schulz, W. author Kranzmann, A. author Lasanta Carrasco, María Isabel author Pérez Trujillo, Francisco Javier author 2018-05 To increase efficiency, modern steam plants are pushing their operational regime from super-critical (600 °C/300 bar) to ultra-super-critical (740/760 °C/350 bar) stretching existing turbine materials to their limits. The focus is on new generation functional materials and technologies which complement the inherent properties of existing materials. Current work proposes a novel High Power Impulse Magnetron Sputtering (HIPIMS) deposition technology, for the first time, for deposition of a ceramic based CrN/NbN coating with a nanoscale multilayer structure (bi-layer thickness Δ = 1.9 nm) with superior adhesion (LC2 = 80 N) to protect low Chromium P92 steel widely used in steam power plants. Thermodynamic calculations predict the equilibrium phases and aggressive gaseous compounds generated by the interaction of steam with the coating. CrN/NbN coated P92 steel samples oxidised at 600 °C in a high pressure (50 bar) 100% steam atmosphere for up to 1000 h reveal the coating's superior oxidation resistance and protective mechanisms, especially against the detrimental effect of Hydrogen. High temperature (650 °C) Tensile Strength, Low Cycle Fatigue and Creep tests confirm that, unlike other state-of-the-art PVD technologies, HIPIMS is not detrimental to the mechanical properties of the substrate material. Water droplet erosion tests confirm no measurable weight loss after 2.4 × 106 impacts P. Eh Hovsepian, A.P. Ehiasarian, Y.P. Purandare, P. Mayr, K.G. Abstoss, M. Mosquera Feijoo, W. Schulz, A. Kranzmann, M.I. Lasanta, J.P. Trujillo, Novel HIPIMS deposited nanostructured CrN/NbN coatings for environmental protection of steam turbine components, Journal of Alloys and Compounds, Volume 746, 2018, Pages 583-593, ISSN 0925-8388, https://doi.org/10.1016/j.jallcom.2018.02.312. (https://www.sciencedirect.com/science/article/pii/S0925838818308090) 0925-8388 10.1016/j.jallcom.2018.02.312 https://hdl.handle.net/20.500.14352/112764 https://doi.org/10.1016/j.jallcom.2018.02.312 https://www.sciencedirect.com/science/article/pii/S0925838818308090 Novel HIPIMS deposited nanostructured CrN/NbN coatings for environmental protection of steam turbine components