Chemically driven structural change in quasicrystalline AlPdMn alloys

Ampo Sai, Y. Yokohama, A. Inoue, T. Masumoto

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Quasicrystals, including face-centered icosahedral (FCI), simple icosahedral (SI) and decagonal (D) phases with periodicities of 1.6 nm and 1.2 nm along periodic axis, are found to form over a wide composition range in the AlPdMn system. A very strong composition dependence of the chemical order is seen in icosahedral Al90-xPdxMn10 alloys alloys. A discontinuous change in the lattice parameter, aR, with the Pd content of the i-phases suggests that the replacement of Al by Pd is selective. The predominant occupation site for the Pd atoms is icosahedral structure varies between the FCI and SI lattices. It is proposed that the FCI phase can be constructed as a two-cell structure, originating from the AlPd and AlMn binary systems.

Original languageEnglish
Pages (from-to)327-331
Number of pages5
JournalJournal of Non-Crystalline Solids
Volume150
Issue number1-3
DOIs
Publication statusPublished - 1992 Nov 2

ASJC Scopus subject areas

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

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