Preparation of Ni55+FeS composite coatings and their antifriction performances in artificial seawater

Publication date: 5 October 2017
Source:Materials & Design, Volume 131
Author(s): Jianbo Zhao, Bin Han, Gang Cui, Shiyi Zhang, Mingyan Li, Yong Wang
The authors recently reported a novel in-situ method of fabricating self-lubricating coatings derived nickel based alloy and ferrous sulfide film by ion sulfurizing at an atmospheric H2/Ar/H2S flow. In the present work, thin 3μm FeS film was deposited on 1.1mm Ni55 coating with a hardness of about 635HV. The microstructural evolution, the bond strength with substrate and antifriction properties in artificial seawater of the processed film are reported. The surface roughness value of FeS film is 0.08μm. The diameters of FeS nano-spheres in the film are in the range of 80–230nm. FeS self-lubricating film exhibited the best self-lubricating effect on Ni55 coating in artificial seawater, compared with that in dry friction and deionized water. This was attributed to its close-packed hexagonal structure, the separation of the salts, and the auxiliary lubrication and cool effect of artificial seawater.

Graphical abstract

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