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Issue 20, 2012
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Dislocations in icosahedral quasicrystals

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Dislocations in quasicrystals, as a direct result of the lack of translational symmetry in these materials, possess various salient features. The Burgers vector of a dislocation in an icosahedral quasicrystal is a 6-dimensional vector, which reflects the fact that the dislocation, besides the phonon-type strain field analogous to dislocations in ordinary crystals, is associated inseparably with a further type of defect, the phasons. Phasons are critically involved in the formation and motion of dislocations in quasicrystals and govern the macroscopic plastic behaviour of these materials. In this article the properties of dislocations in icosahedral quasicrystals are comprehensively reviewed, starting from a continuum-mechanical description, via core-structure simulation, to their full experimental characterization. The experimental results presented address the icosahedral phases in the well explored systems Al–Pd–Mn and Zn–Mg–Dy.

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Publication details

The article was received on 20 Apr 2012 and first published on 03 Jul 2012

Article type: Tutorial Review
DOI: 10.1039/C2CS35150A
Citation: Chem. Soc. Rev., 2012,41, 6745-6759
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    Dislocations in icosahedral quasicrystals

    M. Feuerbacher, Chem. Soc. Rev., 2012, 41, 6745
    DOI: 10.1039/C2CS35150A

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