Creep deformation of single Al-Ni-Co decagonal quasicrystals

The compressive creep deformations at elevated temperatures have been inves tigated using single decagonal Al-Ni-Co samples prepared by Czochralski met hod. The creep deformation is characterized by a significant anisotropy of activation energy between the different compressive directions of 2-fold sy mmetry axis (330 kJ/mol) and 10-fold symmetry axis (120 kJ/mol). The differ ence of deformation mechanisms along the 2-fold and 10-fold axes has been e xamined by the HRTEM observation which showed varied cluster rearrangements .