Can a carbon nano-coating resist metallic phase transformation in silicon substrate during nanoimpact?
S Goel and A Agrawal and NH Faisal, WEAR, 315, 38-41 (2014).
Nanomechanical response of a silicon specimen coated with a sp(3) crystalline carbon coating (1.8 nm thickness) was investigated using MD simulation. A sharp conical rigid tip was impacted at the speed of 50 m/s up to a depth of similar to 80% of the coating thickness. Unlike pure silicon specimen, no metallic phase transformation was observed i.e. a thin coating was able to resist Si-I to Si-II metallic phase transformation signifying that the coating could alter the stress distribution and thereby the contact tribology of the substrate. The stress state of the system, radial distribution function and the load- displacement curve were all aligned with above observations.(1) Crown Copyright (C) 2014 Published by Elsevier B.V. All rights reserved.
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