Document Type

Article

Publication Date

2008

Journal or Book Title

Journal of Materials Research

Volume

23

Issue

5

First Page

1488

Last Page

1493

DOI

10.1557/JMR.2008.0187

Abstract

We show that friction anisotropy is an intrinsic property of the atomic structure of Al–Ni–Co decagonal quasicrystals and not only of clean and well-ordered surfaces that can be prepared in vacuum [J.Y. Park et al., Science 309,1354 (2005)]. Friction anisotropy is manifested in both nanometer-size contacts obtained with sharp atomic force microscope tips and macroscopic contacts produced in pin-on-disk tribometers. We show that the friction anisotropy, which is not observed when an amorphous oxide film covers the surface, is recovered when the film is removed due to wear. Equally important is the loss of the friction anisotropy when the quasicrystalline order is destroyed due to cumulative wear. These results reveal the intimate connection between the mechanical properties of these materials and their peculiar atomic structure.

Comments

This article is from Journal of Materials Research 23, no. 5 (2009): 1488–1493, doi:10.1557/JMR.2008.0187.

Copyright Owner

Materials Research Society

Language

en

File Format

application/pdf

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