Dynamical treatment of the splitting of higher-order-Laue-zone lines induced by dislocations in an icosahedral quasicrystal

Abstract

The dynamical theory of electron diffraction for quasicrystals (QCs) was used to treat the splitting behaviour of higher-order-Laue-zone (HOLZ) lines induced by dislocations in icosahedral quasicrystals (IQCs). The influences of some parameters on the splitting of HOLZ lines were calculated. On the basis of this calculation, several experimental convergent-beam electron diffraction patterns from the aluminium–copper–iron IQC were simulated. Good agreement between the experiment and the simulation confirms the correctness of the dynamical theory of electron diffraction for QCs.