Instability of Al-Cu-Co single quasicrystals at low temperature by W. Bogdanowicz

Crystal Research and Technology

Cryst. Res. Technol. 40, 482 (2005) - Abstract -

Instability of Al-Cu-Co single quasicrystals at low temperature

W. Bogdanowicz

Institute of Materials Science, University of Silesia, ul. Bankowa 12, 40-007 Katowice, Poland

Keywords	Al-Cu-Co single quasicrystals, domains, instability
PACS	61.44.Br, 61.50.Ks, 62.20.Mk
DOI	10.1002/crat.200410371

Decomposition process of the Al-Cu-Co single quasicrystals (falling apart into small pieces) after annealing at 100°C for 20 h was studied by X-ray topography, high-resolution electron microscopy, X-ray diffractometry and optical microscopy. It was found that the decomposition of the single quasicrystals is preceded by the creation of a large number of antiphase microdomains and the deformation of the clusters occurs in the two-fold directions of [01-100] type. The decomposition begins with the propagation of cracks in the directions of [01-100] type.

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