Inorganic fullerene-like tungsten disulfide nanocoating for friction reduction of nickel––titanium alloys. (December 2009)

• Record Type: Journal Article
• Authors: Samorodnitzky-Naveh, Gili R; Redlich, Meir; Rapoport, Lev; Feldman, Yishay; Tenne, Reshef
• Is Part Of: Nanomedicine. Volume 4:Number 8(2009)
• Page Start: 943
• Page End: 950
• Publication Date: 2009-12
• Subjects: cobalt -- electrodeposition -- friction coefficient -- inorganic fullerene -- nanoparticle -- nickel–titanium; Nanotechnology -- Periodicals; Medical technology -- Periodicals; Nanotechnology -- Therapeutic use -- Periodicals; 610.28
• DOI: 10.2217/nnm.09.68
• Languages: English
• ISSNs: 1743-5889

Abstract

Aims: To fabricate a friction-reducing coating onto different nickel––titanium (NiTi) substrates using inorganic fullerene-like tungsten disulfide (IF-WS2 ) nanoparticles and to estimate in vitro friction reducing extent of the coating.Materials & methods: Different NiTi substrates were coated with cobalt and IF-WS2 nanoparticles film by the electrodeposition procedure. Coating composition analyses was made by scanning-electron microscopy, energy dispersive x-ray spectroscopy, x-ray powder diffractometry and x-ray photoelectron spectroscopy. Friction evaluation was carried out using standard tribological tests and an Instron ®® system.Results: Stable and well-adhered cobalt + IF-WS2 coating of the NiTi substrates was obtained. Friction tests presented up to 66% reduction of the friction coefficient.Conclusion: NiTi alloy is widely used for many medical appliances; hence, this unique friction-reducing coating could be implemented to provide better manipulation and lower piercing rates.