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| Abstract No.: |
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| Title: |
Adhesive-corrosion resistance of high velocity metal droplet on atmospheric plasma sprayed Ni-WSe2-BaF2·CaF2-Y-Ag-hBN solid lubricant coatings
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| Authors: |
Xiao-Jing Yuan* / Xi'an Research Institute of Hi-Tech, P.R. China
Bailin Zha / Xian Research Institute of Hi-Tech, China
Xiaohu Chen/ Xian Research Institute of Hi-Tech, China
Nengjun Yang/ Xian Research Institute of Hi-Tech, China
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| Abstract: |
Adhesive-corrosion resistance is an important issue for the application life of solid lubricant coatings. With abundant metal droplets deposited on the surface of a solid self-lubricating coating, the coefficient of friction of the coating changes and results in adhesive wear. In this paper, a new method for evaluating the adhesive resistance for solid self-lubricating Ni-WSe2-BaF2·CaF2-Y-Ag-hBN coatings was reported. The microstructures and anti-adhesive characteristics under different angles of aluminum metal droplets obtained with an arc supersonic nozzle were investigated for high temperature solid self-lubricating coatings produced by plasma spray. The results demonstrate that the friction coefficient of Ni-WSe2-BaF2·CaF2-Y-Ag-hBN solid self-lubricant coatings is distributed between 0.086 and 0.299 at 25-800. The effect of molten metal drops on the coating adhesive-corrosion rate increases with the deposition angle. At 90°, the deposition rate of metal droplets on the coating and substrate surface is maximized, and the hexagonal Boron Nitride (hBN) self-lubricating coating deposition rate is only 58 mg/(cm2·s). hBN can effectively decrease the adhesive layer of the coating by the rate of the polishing and stripping.
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