Nanostructured Cr-WS2 solid lubricant coatings prepared using magnetron sputtering

Deepthi, B and Devi, Mayura and Barshilia, Harish C and Rajam, KS (2010) Nanostructured Cr-WS2 solid lubricant coatings prepared using magnetron sputtering. In: International Conference on Nanomaterials and Nanotechnology, KS Rangasamy College of Technology, Tiruchengode.

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Abstract

Cr-WS2 nanocomposite coatings were deposited at different Cr contents (15-50 at.%) using an unbalanced magnetron sputtering system. Various techniques were used to study the structure, chemical composition, mechanical and tribological properties of the coatings. X-ray diffraction results of Cr-WS2 coatings indicated structural transition from a mixture of nanocrystalline and amorphous phases to a complete amorphous phase with an increase in the Cr content. Cross-sectional high resolution transmission electron microscopy studies revealed that Cr-WS2 coatings prepared at low Cr contents ( 23 at.%) exhibited a mixture of nanocrystalline and amorphous phases. Nanoindentation results indicated that addition of Cr helped in improving the mechanical properties of Cr-WS2 coatings. Microtribometer tests indicated that Cr-WS2 coatings prepared at low Cr contents ( 23 at.%) exhibited superior tribological properties at ambient conditions compared to WS2 coatings, both at low (2 N) and high (7 N) loads.

Item Type: Conference or Workshop Item (Paper)
Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Division/Department: Surface Engineering Division, Other, Surface Engineering Division, Surface Engineering Division
Depositing User: Mr N Selvakumar
Date Deposited: 29 Aug 2011 10:56
Last Modified: 29 Aug 2011 10:56
URI: http://nal-ir.nal.res.in/id/eprint/9836

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