Geometry of dislocations in icosahedral quasicrystals

Denis Gratias (1) , Jean-Tristan Beauchesne (1) , Frédéric Mompiou (2) , Daniel Caillard (3)

1 LEM - ONERA - CNRS - Laboratoire d'étude des microstructures [Châtillon]
2 Metallurgy Division
3 LOE - Laboratoire d'Optique Electronique

Quasicrystals are complex metallic alloys that are ductile at high temperatures close to their melting point. It has been early recognized that their plasticity is due to a flux of moving linear defects in all respects similar to dislocations in ordinary crystals. The present paper is an attempt to propose a simple synthetic analysis of the basic underlying geometry of quasicrystalline dislocations exemplified with experimental and calculated images of dislocations in icosahedral phases.

Mots clés: Physical Sciences

Denis Gratias, Jean-Tristan Beauchesne, Frédéric Mompiou, Daniel Caillard. Geometry of dislocations in icosahedral quasicrystals. Philosophical Magazine, 2006, 86 (25-26), pp.4139-4151. ⟨10.1080/14786430600575435⟩. ⟨hal-00513660⟩