Departmental Papers (MEAM)

Document Type

Journal Article

Date of this Version

6-11-2008

Comments

Suggested Citation:
A.R. Konicek, D.S. Grierson, P.U.P.A. Gilbert, W.G. Sawyer, A.V. Sumant, and R.W. Carpick. (2008). "Origin of Ultralow Friction and Wear in Ultrananocrystalline Diamond." Physical Review Letters. 100, 235502.

© 2008 The American Physical Society
http://dx.doi.org/10.1103/PhysRevLett.100.235502

Abstract

The impressively low friction and wear of diamond in humid environments is debated to originate from either the stability of the passivated diamond surface or sliding-induced graphitization/rehybridization of carbon. We find ultralow friction and wear for ultrananocrystalline diamond surfaces even in dry environments, and observe negligible rehybridization except for a modest, submonolayer amount under the most severe conditions (high load, low humidity). This supports the passivation hypothesis, and establishes a new regime of exceptionally low friction and wear for diamond.

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Date Posted: 19 January 2011

This document has been peer reviewed.