Large-scale molecular dynamics simulations of wear in diamond-like carbon at the nanoscale
16 Aug 2013

Submitted by (Bold are A*Star Staff): Zhen-Dong Sha,Viacheslav Sorkin,Paulo S. Branicio,Qing-Xiang Pei,Yong-Wei Zhang ,David J. Srolovitz

Research Institute: IHPC

Title of Paper: Large-scale molecular dynamics simulations of wear in diamond-like carbon at the nanoscale

Published in: APPLIED PHYSICS LETTERS 103, 073118 (2013)

Abstract: We perform large-scale molecular dynamics simulations on diamond-like carbon to study wear mechanism and law at the nanoscale. Our simulations show that material loss during sliding varies linearly with normal load and sliding distance, consistent with Archard’s law. Our simulations also show that the number of chemical bonds across the contact interface during sliding correlates well with friction force, but not with material loss, indicating that friction and wear follow different mechanisms. Our analysis reveals the following wear mechanism: the shear traction causes mass accumulation at the trailing end of contact, which is then lost by a cluster detachment process.

Acknowledegment remark in publication: This work is supported by A*STAR, Singapore through research Grant No. 092 156 0122, also by the A*STAR Computational Resource Centre through the use of its high performance computing faciilities.

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