Transient ordering states in decagonal Al-Co-Ni at temperatures up to 1000 °C

Evelin Weidner, F. Frey, K. Hradil, M. De Boissieu, G. McIntyre, A. P. Tsai

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)


Disordered decagonal quasicrystals with the nominal compositions Al72Ni12Co16 and Al72.5Ni11Co16.5 were investigated by comparative diffuse neutron (N) and X-ray (X) synchrotron studies, respectively, at temperatures up to 1000 °C. High resolution X-ray measurements reveal peak splitting consistent with a domain structure of 2D qp and 1D qp lamellae. At higher temperatures the strain fluctuations decrease, giving rise to larger areas of the 2D qp and 1D qp domains. In summary, this disordered Al-Co-Ni phase is governed by complex transient ordering states, i.e. twinned lamellar domains of true 2D qc sequences, 1D and periodic domains accompanied by phason straining and phason fluctuations.

Original languageEnglish
Pages (from-to)92-95
Number of pages4
JournalJournal of Alloys and Compounds
Issue number1-2
Publication statusPublished - 2002 Aug 14
Externally publishedYes
EventQC2001 - Sendai, Japan
Duration: 2001 Sep 242001 Sep 28


  • Decagonal Al-Co-Ni
  • Temperature
  • Transient ordering states

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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