Tracing C changes in a C/CrC PVD coating using Raman spectroscopy and EELS

ZHOU, Z, ROSS, I M, RAINFORTH, W M and HOVSEPIAN, Papken (2010). Tracing C changes in a C/CrC PVD coating using Raman spectroscopy and EELS. Journal of Physics: Conference Series, 241, 012108.

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Link to published version:: 10.1088/1742-6596/241/1/012108

Abstract

A C/CrC coating was deposited by unbalanced magnetron sputtering of graphite and Cr metal targets in argon atmosphere for low friction tribological applications. The coating possessed a nanocomposite structure with amorphous carbon embedded in a metastable fcc CrC matrix. The nanocomposite structure was annealed at 750°C in Ar+5%H2 atmosphere for 30 minutes to evaluate its thermal stability. Microstructures of the as-deposited and annealed coating were characterised using Raman spectroscopy and cross sectional transmission electron microscopy coupled with electron energy loss spectroscopy (TEM/EELS). Raman spectroscopy suggested the presence of graphitic carbon in the coating after annealing. EELS (ELNES of C K) combined with HRTEM investigation of the cross sections revealed graphitic C at the very top (~200nm) of the coating and amorphous C at the remaining part of the coating after annealing at 750°C. The advantages and limitations of Raman spectroscopy and TEM techniques in studying C/CrC coating are also discussed.

Item Type: Article
Research Institute, Centre or Group: Materials and Engineering Research Institute > Thin Films Research Centre > Nanotechnology Centre for PVD Research
Identification Number: 10.1088/1742-6596/241/1/012108
Depositing User: Helen Garner
Date Deposited: 05 Jan 2012 16:17
Last Modified: 05 Jan 2012 16:17
URI: http://shura.shu.ac.uk/id/eprint/4258

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