Phason flips which accompanied the glide of a perfect dislocation were examined by using the Burkov model for a decagonal quasicrystal which was a pseudo-binary alloy of Al plus transition metals. It was shown that the glide of a perfect dislocation was difficult, without producing chemical disorder. There were three extreme cases for the glide of a dislocation in the quasicrystal. Firstly, there was conservative glide at a very high temperature where complete phason relaxation occurred. Secondly, there was glide which produced chemical disorder. Thirdly, there was glide which produced a stacking fault with the fault vector being the phason component of the Burgers vector.

Dislocation Migration and Phason Strain Relaxation in a Quasicrystal. S.Takeuchi, K.Shinoda, K.Edagawa: Philosophical Magazine A, 1999, 79[2], 317-27