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- W4360820539 abstract "A hybrid nanocrystalline cobalt-based coating was prepared by cathode plasma electrolytic deposition (CPED). Zinc oxide and graphene oxide (GO) nanoparticles were mixed to form a core-shell structure through electrostatic self-assembly by using (3-aminopropyl)triethoxysilane (APTES) modifier. [email protected] nanoparticles were used as additives to improve wear and friction properties of deposited coatings. The concentration effect of core-shell [email protected] addition (0.1, 0.2 and 0.3 %wt) on the friction, wear, coating thickness and mechanical properties was investigated. The composition and microstructure of deposited coatings were studied by scanning electron microscope (SEM), X-ray diffraction (XRD), Raman spectroscopy and energy dispersive spectroscopy (EDS). Reciprocating sliding wear tests using a ball-on-plate configuration were carried out on a PLINT TE67 tribometer. AISI 52100 steel was used as ball and the coating deposited onto a AISI 304 stainless steel substrate was used as plate. Coatings were dense, nanocrystalline and uniform with a FCC metastable cobalt structure. Core-shell concentration above to 0.2 %wt resulted in a decrease of grain size and an increase of hardness and wear resistances. Nanoparticles act as nucleation sites for grain formation, decreasing grain sizes. Samples using 0.3% [email protected] displayed the lowest wear and friction coefficients. [email protected] nanoparticles enables the formation of a protective layer consisting of oxide and exfoliated GO on the top of worn surfaces." @default.
- W4360820539 created "2023-03-25" @default.
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- W4360820539 date "2023-06-01" @default.
- W4360820539 modified "2023-10-01" @default.
- W4360820539 title "On the tribological behavior of cobalt-based nanocomposite coatings containing ZnO@Graphene oxide core-shell nanoparticles" @default.
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- W4360820539 doi "https://doi.org/10.1016/j.wear.2023.204835" @default.
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