Anomalous small-angle scattering from nanoquasicrystalline precipitates in Zr80Pt20 ribbons

Hiroshi Okuda, Takefumi Fukumoto, Junji Saida, Shojiro Ochiai, Sono Sasaki, Hiroyasu Masunaga

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Anomalous small-angle X-ray scattering (ASAXS) profiles of Zr 80Pt20 ribbons have been measured at the Zr K absorption edge. By annealing the melt-spun ribbons at 800 K, well defined SAXS patterns from nanoquasicrystals were observed, although the compositions of the quasicrystals (QC) and the amorphous matrix have previously been reported to be the same. The SAXS intensities were found to show a small anomalous effect at the Zr K edge. Contrast analysis suggested that the origin of the small-angle scattering is a small compositional fluctuation coupled with a small density difference, which enhances SAXS intensity but reduces the anomalous effect. A constant ASAXS intensity ratio for QC microstructure suggests that the ratio of the composition difference to the density difference between QC and the amorphous matrix is almost constant for the ZrPt ribbons examined here.

Original languageEnglish
Pages (from-to)675-679
Number of pages5
JournalJournal of Applied Crystallography
Volume41
Issue number4
DOIs
Publication statusPublished - 2008 Jul 24

Keywords

  • Anomalous small-angle X-ray scattering
  • Quasicrystal
  • Zr-Pt

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

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