Structural Differences between Al–Fe–Cu and Al–Li–Cu Quasicrystals Studied by High-Resolution Electron Microscopy

概要

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Stable icosahedral phases of Al–Fe–Cu and Al–Li–Cu, which are recognized as icosahedral quasicrystals corresponding to face-centered and simple 6D-hypercubic lattices, respectively, were examined by high-resolution electron microscopy with the incident beam parallel to the two-fold symmetry axis. Images observed were analyzed in detail with the aid of computerized image processing. In the image of Al–Li–Cu, a contrast modulation of about $\tau^{3}$ times distance of lattice spacing was observed on lattice fringes perpendicular to the 5-fold symmetry axes, whereas in Al–Fe–Cu, complex contrast modulations with various distances of 2, 3, and 5 lattice spacings were observed on the lattice fringes perpendicular to the same axes.
INSTITUTE OF PURE AND APPLIED PHYSICSの論文
1989-12-20