Approximant-based orientation determination of quasicrystals using electron backscatter diffraction

•Quasicrystal EBSD mapping using commercial software.•Approximants structures used for EBSD mapping of quasicrystals.•Pseudosymmetry data treatment routines.•MTEX based quasicrystal EBSD data visualization. Orientation mapping of quasicrystalline materials is demonstrated using crystalline approximant structures in the technique of electron backscatter diffraction (EBSD). The approximant-based orientations are symmetrised according to the rotational point group of the quasicrystal, including the visualization of orientation maps using proper colour keys for quasicrystal symmetries. Alternatively, approximant-based orientation data can also be treated using pseudosymmetry post-processing options in the EBSD system software, which enables basic grain size estimations. Approximant-based orientation analyses are demonstrated for icosahedral and decagonal quasicrystals.