Electron diffraction and electron microscope study on decagonal quasicrystals on AlNiFe alloys

M. Tanaka, K. Tsuda, M. Terauchi, A. Fujiwara, A. P. Tsai, A. Inoue, T. Masumoto

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

Decagonal quasicrystals of Al70Ni10+xFe20-x(0 ≤ x ≤ 10) were investigated by convergent-beam electron diffraction (CBED) and transmission electron microscopy (TEM). It was revealed by the CBED method that the alloys with 0 ≤ x ≤ 7 belong to the space group of the noncentrosymmetric P10m2 and those with 7 < x ≤ 10 to the centrosymmetric P10/mmm. High resolution electron microscope images detected the existence of a specific pentagonal atom cluster in all the alloys investigated. Dark-field microscopy disclosed that the change in space group at x ≈ 7.5 takes place upon the sudden decrease of the domain size or the rapid mixing of the atom clusters with the positive and negative polarities.

Original languageEnglish
Pages (from-to)98-102
Number of pages5
JournalJournal of Non-Crystalline Solids
Volume153-154
Issue numberC
DOIs
Publication statusPublished - 1993 Feb 2

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

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