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Can a carbon nano-coating resist metallic phase transformation in silicon substrate during nanoimpact?

Goel, Saurav; Agrawal, Anupam; Faisal, Nadimul Haque

Authors

Saurav Goel

Anupam Agrawal

Nadimul Haque Faisal



Abstract

Nanomechanical response of a silicon specimen coated with a sp3 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 ~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

Journal Article Type Article
Publication Date Jul 15, 2014
Journal Wear
Print ISSN 0043-1648
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 315
Issue 1-2
Pages 38-41
Institution Citation GOEL, S., AGRAWAL, A. and FAISAL, N.H. 2014. Can a carbon nano-coating resist metallic phase transformation in silicon substrate during nanoimpact? Wear [online], 315(1-2), pages 38-41. Available from: https://doi.org/10.1016/j.wear.2014.03.009
DOI https://doi.org/10.1016/j.wear.2014.03.009
Keywords MD simulation; Phase transformation; Silicon; Carbon; Coating; Nanoimpact

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