Abstract
Nickel-based nanocomposite coatings were prepared from a Watts-type electrolyte containing reinforcement’s particles (silicon carbide and graphite) to deposit onto the steel St-37 substrate. The electrochemical plating of the coatings in absence and presence of surfactants and reinforcements particles was carried out to optimize high quality coatings with appropriate mechanical and morphological features. The surfactants such as cetyltrimethylammonium bromide (CTAB), sodyumdodecyl sulfate (SDS), and saccharine affected electrodeposition plating and subsequently changed mechanical characteristics. Based on XRD results, the dominant phases in the absence of surfactants were nickel oxide (NiO), nickel, and silicon carbide (SiC), while the main phases in presence of surfactants were nickel (Ni) and SiC. The hardness of the resultant coatings was found to be from 332 to 593 (Hv) depending on the bath parameter and the reinforcements weight percentage (wt%) in the Ni matrix. Microscopic observations illustrated a cluster-like structure which consisted of some fine sphere particulates with average particle size of 65–150 nm. According to elemental mapping spectra, a homogenous distribution of nickel, silicon, and carbon particles appeared into the nickel matrix coating. Finally, the experimental outcomes demonstrated that the surfactants have significant influence on the composition of coatings, surface morphology, and mechanical properties.
Highlights
E recent researches in surface engineering were signi cantly focused on the development of low carbon steels (St37) surfaces which can meet the industrial request [1,2,3,4]. e mechanical properties of many parts of surfaces were promoted by coating of numerous pure metals, ceramics, and alloys which can be deposited with ne grain sizes, for example, Ni, Pd, Cu, Ni–P, Ni–W, and Ni–Fe–Cr [5, 6]
It should be mentioned that nanocomposite coatings are valuable for promoting of the surface properties so that they have been revolutionized surface sciences and applications. e use of particles in coatings could decline the problem of created imperfection, such as voids between the particles and matrix interfaces
Nickel coatings were deposited from Watts bath by direct current (DC) electroplating
Summary
E recent researches in surface engineering were signi cantly focused on the development of low carbon steels (St37) surfaces which can meet the industrial request [1,2,3,4]. e mechanical properties of many parts of surfaces were promoted by coating of numerous pure metals, ceramics, and alloys which can be deposited with ne grain sizes, for example, Ni, Pd, Cu, Ni–P, Ni–W, and Ni–Fe–Cr [5, 6]. E mechanical properties of many parts of surfaces were promoted by coating of numerous pure metals, ceramics, and alloys which can be deposited with ne grain sizes, for example, Ni, Pd, Cu, Ni–P, Ni–W, and Ni–Fe–Cr [5, 6]. Various methods such as electrodeposition, ion implantation, chemical vapor deposition (CVD), laser beam deposition, physical vapor deposition (PVD), plasma, and high-velocity oxygen fuel (HVOF) spraying have been developed [7, 8]. The mechanical properties of all specimens were compared under different circumstances which exhibited valuable results
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