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

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

Abstract

Nanomechanical response of a silicon specimen coated with a sp3 crystalline carbon coating (1.8nm thickness) was investigated using MD simulation. A sharp conical rigid tip was impacted at the speed of 50m/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.

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

• Journal Article Type: Article
• Acceptance Date: Mar 21, 2014
• Online Publication Date: Mar 29, 2014
• Publication Date: Jul 15, 2014
• Deposit Date: May 26, 2016
• Publicly Available Date: May 26, 2016
• Journal: Wear
• Print ISSN: 0043-1648
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 315
• Issue: 1-2
• Pages: 38-41
• DOI: https://doi.org/10.1016/j.wear.2014.03.009
• Keywords: MD simulation; Phase transformation; Silicon; Carbon; Coating; Nanoimpact
• Public URL: http://hdl.handle.net/10059/1489