安定準結晶の構造と単準結晶の作製

概要

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Recent progress on stable quasicrystals was reviewed especially on the Al-Cu-Fe icosahedral phase. Electron microscopy and diffraction experiments including X-ray diffuse scattering measurement of single-quasicrystal specimen revealed that quasiperiodicity is realized in this icosahedral phase with high degree of perfection: Extinction rule in the diffraction pattern indicated F-type superlattice ordering in the corresponding 6-dimensional cubic lattice. Both thermal and quenched phasons are very few in this icosahedral phase at room temperature. Method of single-quasicrystal synthesis in this alloy system was described in detail. Possibility of low-temperature transformation to an approximant structure suggested that careful investigation is necessary in order to examine existence of quasiperiodicity in a probable quasicrystal specimen.
日本結晶成長学会の論文
1992-03-15