Synchrotron X-ray studies of phason and phonon strains in a Co-rich Al-Ni-Co decagonal quasicrystal

Kazuki Yamamoto, Wang Yang, Yutsuki Nishimura, Naoshi Ikeda, Yoshie Matsuo

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Peak broadening and peak shifts of Bragg reflections were studied with the synchrotron single-crystal X-ray diffraction method for an Al 72.7Ni 8.5Co 18.8 decagonal quasicrystal classified as the 5f state. From the Q and Q dependences of the full width of half maximum (FWHM) of the Bragg reflections along the longitudinal direction, the coexistence of random phason strains with phonon strains was observed. High-resolution synchrotron X-ray measurements could present quantitative estimations of these strains. The value of the random phason strain component is 0.0054 ∼ τ -11. The asymmetrical broadening due to the phonon strain shows that the single crystal may be constructed with two kinds of grains that have A 5D values of 0.6273 and 0.6265 nm.

Original languageEnglish
Pages (from-to)1255-1260
Number of pages6
JournalMaterials Transactions
Volume45
Issue number4
DOIs
Publication statusPublished - Apr 2004

Keywords

  • Aluminum nickel cobalt alloy
  • Decagonal phase
  • Phason strain
  • Phonon strain
  • Quasicrystal
  • Synchrotron x-ray diffraction

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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