Ni–SiC composite plated under a modulated current

Effect of Surfactants on the Electrodeposition of Ni-SiC Composites

“…Saccharine has been used by Zimmerman et al and Lei Shi et al [22,42]. The properties of Ni-SiC composite coatings have been improved by producing them as gradient coatings [23,26,43] and by using pulse technique or triangular waveform [23,24,35,44,45]. Nano composites have also been produced by electroless technique [37,[46][47][48][49][50].…”

Hardening effect induced by incorporation of SiC particles in nickel electrodeposits

“…Recently, a new generation of metal matrix composites reinforced by micron and nano-sized particles has attracted scientific and technological interest due to the recent availability of ever decreasing particle sizes and due to the resulting enhanced properties of the coatings, such as hardness, wear and corrosion resistance [4][5][6][7][8][9].…”

“…Considerable research has been mainly focused on the impact of the electrodepostion parameters: electrolysis conditions (composition of the electrolytic bath, presence of additives, pH value), current conditions (type of imposed current and values of the current density) and properties of the reinforcing particles (size, surface properties, concentration and type of dispersion in the bath) on the electrolytic codeposition process of SiC with Ni, as well as the properties of the composite electrocoatings [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. In general, it has been observed that the amount of embedded SiC particles increases with both increasing concentration of suspended SiC particles and surfactant or organic additives in the electrolyte [14][15][16][17][18].…”

“…Relatively less research work has been done to examine the effect of the current type on the codeposition process of the composite Ni/SiC electrocoatings [4,7,12,13,22], although a significant number of reports have shown that the microstructure and properties of pure Ni deposits may be effectively altered under specific pulse current conditions [23][24][25][26]. Pulse electrodeposition has been found to be an effective means of perturbing the adsorption-desorption phenomena occurring at the electrode-electrolyte interface and hence the electrocrystallization process.…”

Wear and corrosion behaviour of Al2O3-TiO2 coatings produced by flame thermal projection

“…The properties of the coatings are evaluated by measuring the microhardness, ductility, wear resistance, coefficient of friction and corrosion resistance, which vary according to particle type, size, volume percentage and distribution in the tank [4,5], the thermal projection is a technique that consists of the deposition of coatings with torches that generate the necessary heat to melt the material and accelerate it towards the substrate by means of compressed gas and then the particles collide on the surface forming layers that adhere to irregularities of the surface and allows obtaining high-melting ceramic coatings [6]. Aluminides possess a sufficient concentration of aluminium to form a layer of alumina when exposed to atmospheres of air and oxygen, which makes them have excellent resistance to oxidation and corrosion in aggressive chemical environments [7].…”