Hot corrosion behaviour of low Al NiCoCrAlY cladded coatings reinforced by nano-particles on a Ni-base super alloy |
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| Authors: | Hongyu Wang Dunwen Zuo Guifang Sun Xu Cheng |
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| Affiliation: | a School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, PR China
b College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, PR China |
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| Abstract: | Three NiCoCrAlY coatings with Al content lower than 5 wt.% reinforced by different kinds of nano-particles with the same addition and one without nano-particles were prepared on a Ni-base super alloy using laser cladding technique. Hot corrosion of the NiCoCrAlY coatings in Na2SO4/K2SO4 (75:25, wt./wt.) mixture was performed at 1050 °C in static air. Results indicate that the hot corrosion resistance of the coatings with nano-particles is better than that of the one without nano-particles, among which the one with nano-CeO2 presented the best hot corrosion resistance. Effects of nano-particles on the hot corrosion behaviour were also discussed. |
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| Keywords: | A. Metal matrix composites A. Super alloys A. Rare earth elements B. Weight loss C. Hot corrosion |
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