CHROMIUM-RICH COATINGS WITH WS₂ NANOPARTICLES CONTAINING FULLERENE-LIKE STRUCTURE

Abstract

In this work chromium-rich coatings impregnated with fullerene-like (IF)-WS2 nanoparticles were deposited on stainless steel substrates. The coatings were obtained from a trivalent chromium bath at pH 2 by galvanostatic electrodeposition. Zinc and cobalt salts were added to the aqueous solution in small amounts serving as cationic growth promoters. Photodeposition of tin-palladium nanoparticles was used as seeding enhancer for the co-deposition of the fullerene-like nanoparticles. The coatings were characterized by a number of techniques and were found to show a decreasing gradient of the IF nanoparticles towards the film-substrate interface. Tribological tests showed that in contrast to the substrate and the pure metal coating, the IF-containing films exhibit low friction and wear.

Covalent functionalization/polycarboxylation of tungsten disulfide inorganic nanotubes (INTs-WS2)

“…These metal dichalcogenide nanomaterials have emerged as one of the most promising classes of nanomaterials since the discovery of CNTs. As with early research in the field of CNTs, a number of potential applications have been proposed [19] including areas such as energy storage [20], field effect transistors [21], nanocomposite coatings [22,23], battery anodes [24], light-emitting diodes [25], self-lubricating medical devices [26], and high-performance lubricants [27][28][29][30][31][32][33][34]. In addition, the outstanding shock absorbing ability of WS 2 NPs [35][36][37] holds potential for new impact and shock resistant materials.…”

IF-MoS2 based lubricants: Influence of size, shape and crystal structure

“…Inorganic fullerene-like (IF) nanoparticles continue to garner widespread interest in tribology applications, such as friction modifiers and anti-wear additives in liquid lubricants [1][2][3][4] and as solid lubricants [5][6][7]. Their efficiency for tribological application when they are dispersed in oil is related to their lubrication mechanism which depends on experimental conditions and intrinsic properties of the nanoparticles.…”

Nanotechnology for military applications: A survey of recent research in Military technical institute

“…In the form of inorganic fullerene-like particles, with unique morphology, spherical and closed structure, they possess a chemical inertness and a high elasticity. Due to these exceptional characteristics, inorganic fullerene-like particles, such as tungsten disulfide IF-WS 2 , are recognized as promising materials and promising fillers of the composites and are extensively studied for their ability to control wetting, adhesion, lubrication on surfaces and interfaces, and to achieve good corrosion protection and wear resistance, thus, they may be used as an addition for different types of protective coatings [28,29]. Multilayer tungsten disulfide nanotubes have shown outstanding shock resistance properties that are superior even of carbon nanotubes.…”