Synthesis, characterization and evaluation of titanium carbonitride surface layers with varying concentrations of carbon and nitrogen

Titanium carbonitride (TiCN) surface layers were grown by direct exposure of Ti to a gas mixture of ammonia and methane at 1050°C. TiCxN1−x coatings with varying C/N ratio were synthesized by appropriately changing the content of methane and ammonia in the reactive gas mixture. The resultant layers...

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Bibliographic Details
Published in:Ceramics international 2012-04, Vol.38 (3), p.2253-2259
Main Authors: Ajikumar, P.K., Kamruddin, M., Kalavathi, S., Balamurugan, A.K., Kataria, S., Shankar, P., Tyagi, A.K.
Format: Article
Language:English
Subjects:
Ammonia
Carbon
Friction
Friction coefficient
Gas mixtures
Methane
Microhardness
SEM
Titanium
Titanium carbide
Titanium carbonitride
XRD
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Summary:Titanium carbonitride (TiCN) surface layers were grown by direct exposure of Ti to a gas mixture of ammonia and methane at 1050°C. TiCxN1−x coatings with varying C/N ratio were synthesized by appropriately changing the content of methane and ammonia in the reactive gas mixture. The resultant layers were subjected to various characterization and evaluation techniques to study the variation of properties with respect to change in C/N ratio. A systematic change in lattice parameter and microstructure was observed as a function of the composition of active gas mixture. Friction coefficient of TiC was found to be extremely low (0.078). Reaction mechanisms for the growth of TiN and TiC were found to be entirely different. The effect of composition of the gas mixture on growth kinetics of TiCN is elucidated.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2011.10.075