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Graphite-like carbon (GLC) coating is a kind of amorphous carbonaceous coating material with sp2 bond as the main chemical bond structure, and its moderate toughness matching is among many amorphous carbon-based coating materials. Good multi-environment self-adapting anti-friction and wear-resistance characteristics have attracted much attention. Especially its low friction and low wear characteristics in the humidity or water environment effectively overcomes the traditional molecular sensitivity of the amorphous carbon-based coating or the diamond-like coating tribological water, and is a basic part of the mechanical movement for the humidity or water environment. The extension of life, protection and reliability have opened up new technological approaches. British Teer Corporation, University of Sydney, Australia, Chinese Academy of Sciences Lanzhou Institute of Chemical Physics and other institutions have R & D team have conducted systematic research on GLC coating humidity or freshwater environmental tribological behavior, preliminary GLC coating in a humid atmosphere or water-based fluid environment Tribological application in the lay the scientific basis.
In recent years, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences/Key Laboratory of Marine New Materials and Applied Technology, Chinese Academy of Sciences, Wang Yongxin and others, in view of modern marine industry's urgent need for high-performance wear-resistant protective coatings and GLC coating In the potential advantages of the application of tribology protection in water-based fluid environment, further research on the tribology of GLC coating in seawater environment has been carried out. The research team started with the design of GLC coatings with different dimensions or structural characteristics. Firstly, the composition and agglomeration characteristics of the chemical bonds of the coating, the form of the transition layer, and the structural features of the nanostructure, texturing, and its dimensional density were successfully achieved. The controllable structure, and then systematically studied the relationship between the different dimensional structural characteristics of GLC coating and the tribological characteristics of seawater environment, and then analyzed the friction reduction mechanism and wear damage mechanism of GLC coating in seawater environment. A low-friction, low-abrasion, multi-scale, multi-dimensional structure design method for GLC coatings for high-performance seawater environments was preliminarily formed. The results show that the chemical bond composition and agglomeration characteristics obtained when the energy density of the magnetron sputtering target is 0.040 W/mm2 allow the best overall tribological performance of a single-layer GLC coating in a seawater environment. Enhancing the nano-interlocking gradient transition layer structure enables the composite GLC coating to have the highest tribological load carrying capacity in seawater environments. The specific size and density of the micro-pit texture can significantly reduce the coefficient of friction and wear of multi-dimensional GLC coatings in seawater environments. damage.
This part of the research work has been supported by projects supported by the National Natural Science Foundation of China (51202261), the National "973" Project Subproject (2013CB632302) and the China Postdoctoral Science Foundation (2013T60610), and has successively been involved in Surface & Coating Technology, Tribology International, and Rubbing. He has published more than 10 papers in professional academic journals such as the Journal of Science and Technology, and applied for 5 invention patents. Based on a series of research findings and important conclusions, the coating material technology has received high attention from users of industries such as offshore, nuclear power, hydraulics, valves, transmissions, etc., and has jointly built a number of joint laboratories or R&D centers with relevant user units. Targeted practical technology development work is steadily advancing.
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