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Development of Self-lubricating Nanocomposite Coatings impregnated with in-situ formed MoS2 for Tribological Applications (NANOCOAT)
Start date: 03 Dec 2008, End date: 02 Dec 2010 PROJECT  FINISHED 

"Use of self-lubricated coatings in dynamic contacting parts of the system not only reduces complexity, weight, and cost to the system, but also improves the performance to a great extent by reducing friction and wear. Unlike liquid lubricants, the release of various toxic and harmful chemicals to the environment can also be avoided. So, a self-lubricated surface with a long lifetime is a promising one to meet future challenges. The most common solid lubricants are graphite and transition metals layered dichalcogenides, among which MoS2/WS2 has a great prominence. In this proposal, electrodeposition of Co-W alloys impregnated with MoS2 and WC nanoparticles will be carried out to form nanocomposite coatings by a low cost electrodeposition process. The idea is to impart high hardness and mechanical strength by WC particles for wear resistance; and self-lubrication property by MoS2 particles to a Co-W matrix. Firstly, unlike ELECTROLYTIC CO-DEPOSITION from suspensions of MoS2 nanoparticles, here, emphasis will be on the in-situ formation of MoS2 particles in the electrical double layer followed by their incorporation into Co-W alloys during electrolytic reduction process. Secondly, R&D efforts will be directed to co-deposit WC particles from suspensions along with MoS2 to make self-lubricated wear-resistant nanocomposite coatings. The detailed mechanistic study of MoS2 nucleation and growth; the surface and structural characterization of the nanocomposite coatings, wear and friction property and corrosion will be investigated to understand the structure property correlation. Thirdly, the electrodeposition of Co-W+WC+IF-MoS2 nanocomposite coatings will be carried out from electrolytic suspensions of WC and IF-MoS2 nanoparticles, and the properties will be compared with the former nanocomposites. A special attention will be given on the onset of an implementation of this technology into industrial practice."
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