Issue |
Europhys. Lett.
Volume 49, Number 5, March I 2000
|
|
---|---|---|
Page(s) | 603 - 609 | |
Section | Condensed matter: structure, mechanical and thermal properties | |
DOI | https://doi.org/10.1209/epl/i2000-00193-6 | |
Published online | 01 September 2002 |
Quasicrystalline gold interface with a hypo-friction property
1
Département de recherche fondamentale sur la matière condensée,
SP2M CEA-Grenoble, 38054 Grenoble cedex 9, France
2
National Center for Electron Microscopy, LBNL
University of California Berkeley - CA 94720, USA
Corresponding author: FLancon@cea.fr
Received:
26
July
1999
Accepted:
16
December
1999
We have studied a non-symmetric and non-periodic grain boundary in
gold. An atomic model is presented and the atomic positions are found
to be in agreement with the electron microscopy images. Using the
diffraction pattern, we show that the structure is quasicrystalline
and related to the irrational number . A complete hyperspace
periodic description of the interface is given. We use this
theoretical view to predict that in the case of an infinite interface
of this type, two crystals should glide freely along the
incommensurate x-direction whereas they should be blocked along the
commensurate z-direction and be adhesive along the third y-direction
perpendicular to the boundary. A numerical test confirms
this property.
PACS: 61.44.Br – Quasicrystals / 61.72.Mm – Grain and twin boundaries / 62.20.Qp – Tribology and hardness
© EDP Sciences, 2000
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