The coating and deposition process with excellent anti wear and suitable for industrial application were developed, and the optimum bath composition and process were obtained by studying the influence of the bath comp...The coating and deposition process with excellent anti wear and suitable for industrial application were developed, and the optimum bath composition and process were obtained by studying the influence of the bath composition, temperature and pH value on the deposition rate and the plating solution stability. Moreover, the tribological properties of nano-Cu lubricating additives and electroless deposited Ni-W-P coating as well as their synergistic effect are researched using ring-block abrasion testing machine and energy dispersive spectrometer. Research results show that Ni-W-P alloy coating and nano-Cu lubricating additive have excellent synergistic effect, e g, the wear resistance of Ni-W-P alloy coating （with heat treatment and the oil with nano-Cu additives） has increased hundreds times than 45 steel as the metal substrate with the basic oil, and zero wear is achieved, which breaks through the bottleneck of previous separate research of the above-mentioned two aspects.展开更多
To compare the merits of Ni and Cu,the mechanical and tribological properties of CrBN coatings modified by Ni or Cu incorporation were studied.The results demonstrated that the CrBN–Cu coatings presented a lower fric...To compare the merits of Ni and Cu,the mechanical and tribological properties of CrBN coatings modified by Ni or Cu incorporation were studied.The results demonstrated that the CrBN–Cu coatings presented a lower friction coefficient than CrBN and CrBN–Ni coatings owing to the improved lubrication effect of the CuO layer originating from the tribochemical reaction.However,the hardness decline due to Cu incorporation was much greater than that of Ni incorporation.Thus,the CrBN–Cu coatings exhibited a higher wear rate than the CrBN coating.In contrast,the plastic deformation enhancement induced by Ni incorporation exceeded the hardness decline.Therefore,the wear of CrBN–Ni coatings partially turned to plastic deformation to present a lower wear rate than that of the CrBN coating.展开更多
文摘The coating and deposition process with excellent anti wear and suitable for industrial application were developed, and the optimum bath composition and process were obtained by studying the influence of the bath composition, temperature and pH value on the deposition rate and the plating solution stability. Moreover, the tribological properties of nano-Cu lubricating additives and electroless deposited Ni-W-P coating as well as their synergistic effect are researched using ring-block abrasion testing machine and energy dispersive spectrometer. Research results show that Ni-W-P alloy coating and nano-Cu lubricating additive have excellent synergistic effect, e g, the wear resistance of Ni-W-P alloy coating （with heat treatment and the oil with nano-Cu additives） has increased hundreds times than 45 steel as the metal substrate with the basic oil, and zero wear is achieved, which breaks through the bottleneck of previous separate research of the above-mentioned two aspects.
基金This work has been financially supported by the National Natural Science Foundation of China(Grant No.51705245)Natural Science Foundation of Jiangsu Province(Grant No.BK20170794)National Key Laboratory of Science and Technology on Helicopter Transmission,Nanjing University of Aeronautics and Astronautics(Grant No.HTL-A-20G06).
文摘To compare the merits of Ni and Cu,the mechanical and tribological properties of CrBN coatings modified by Ni or Cu incorporation were studied.The results demonstrated that the CrBN–Cu coatings presented a lower friction coefficient than CrBN and CrBN–Ni coatings owing to the improved lubrication effect of the CuO layer originating from the tribochemical reaction.However,the hardness decline due to Cu incorporation was much greater than that of Ni incorporation.Thus,the CrBN–Cu coatings exhibited a higher wear rate than the CrBN coating.In contrast,the plastic deformation enhancement induced by Ni incorporation exceeded the hardness decline.Therefore,the wear of CrBN–Ni coatings partially turned to plastic deformation to present a lower wear rate than that of the CrBN coating.
