Influence of TiC/a-C phase on tribological properties of composite coatings

N. Kumar, S. Dash, M. Kamruddin, C. R. Das, P. Chandramohan, M. P. Srinivasan, A. K. Tyagi, B. Raj

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Gas phase carburisation of titanium in CH 4 atmosphere was carried out in a thermogravimetric analyser. The analysis revealed the formation of TiC phase embedded in an amorphous carbon (a-C) matrix. Raman scattering investigation revealed the evolution of two separate peaks corresponding to D and G band vibrational modes in a hexagonal sp 2 phase of the graphite-like structure. The tribological properties of this coating relied significantly on the relative extent of D and G band modes with the evolution of TiC phase. A sharp transition of friction from lower to higher value was observed due to the wearing out of tribolubricant phases of TiC with disordered graphite-like structure present in the a-C matrix. In case of thicker coating, a lower regime of friction was observed with longer wear distances. © 2011 W. S. Maney & Son Ltd.
Original languageEnglish
JournalTribology - Materials, Surfaces & Interfaces
Issue number4
Pages (from-to)172-176
Publication statusPublished - 2011
Externally publishedYes


  • Composite coatings
  • Friction
  • TiC/a-C
  • Wear


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