Structural, mechanical and tribological investigations of sputter deposited CrN–WS2 nanocomposite solid lubricant coatings

Deepthi, B and Barshilia, Harish C and Rajam, K S and Manohar, S Konchady and Devdas, M Pai and Jagannathan, Sankar (2011) Structural, mechanical and tribological investigations of sputter deposited CrN–WS2 nanocomposite solid lubricant coatings. Tribology International, 44 . pp. 1844-1851.

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Abstract

Nanocomposite coatings of CrN–WS2 were prepared at different Cr contents (approximately 8–39 at%)using an unbalanced magnetron sputtering system. Structural changes in CrN–WS2 coatings with variation in Cr content were studied using X-ray diffraction. CrN–WS2 coatings displayed a dense, compact microstructure with reduced columnar growth in the field emission scanning electron microscopy data. Nanoindentation and nanoscratch data showed that CrN–WS2 coatings exhibited improved mechanical and adhesive properties, respectively. Micro-tribometer tests at a load of 2 N indicated that CrN–WS2 coatings prepared at 31 at% Cr exhibited a stable friction coefficient of 0.20–0.24 even after 8 h.

Item Type: Journal Article
Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Division/Department: Surface Engineering Division, Surface Engineering Division, Surface Engineering Division, Other, Other, Other
Depositing User: Dr. Harish C. Barshilia
Date Deposited: 02 Nov 2011 11:33
Last Modified: 04 Jan 2012 13:19
URI: http://nal-ir.nal.res.in/id/eprint/10026

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