Orientation relationship between the T structure and the icosahedral quasicrystal in the Zn-Mg-Al alloy system

Kei Nakayama, Junya Watanabe, Yasumasa Koyama

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    To understand the crystallographic relation between the Bergman-type icosahedral quasicrystal and its approximant-T structure, we have investigated the crystallographic features of prepared Zn-Mg-Al alloy samples, mainly by transmission electron microscopy. It was found that there existed three kinds of regions: that is, C14-Laves, approximant-T, and icosahedral-quasicrystal regions, in Zn-Mg-Al alloy samples with the composition of Zn-36at.%Mg-9at.%Al. Among these regions, in particular, we tried to determine an orientation relationship between neighboring icosahedral-quasicrystal and approximant-T regions. Based on the determined relationship, for instance, four threefold rotatory-inversion axes in the T structure were found to be parallel to four of ten threefold rotatory-inversion axes in the icosahedral quasicrystal. It was thus understood that the atomic arrangements of the Bergman-type icosahedral quasicrystal and its approximant-T structure are likely to resemble each other.

    Original languageEnglish
    Title of host publicationFrontiers in Materials Science, FMS 2015: Proceedings of the 2nd International Symposium on Frontiers in Materials Science
    PublisherAmerican Institute of Physics Inc.
    Volume1763
    ISBN (Electronic)9780735414211
    DOIs
    Publication statusPublished - 2016 Aug 26
    Event2nd International Symposium on Frontiers in Materials Science, FMS 2015 - Tokyo, Japan
    Duration: 2015 Nov 192015 Nov 21

    Other

    Other2nd International Symposium on Frontiers in Materials Science, FMS 2015
    CountryJapan
    CityTokyo
    Period15/11/1915/11/21

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    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    Nakayama, K., Watanabe, J., & Koyama, Y. (2016). Orientation relationship between the T structure and the icosahedral quasicrystal in the Zn-Mg-Al alloy system. In Frontiers in Materials Science, FMS 2015: Proceedings of the 2nd International Symposium on Frontiers in Materials Science (Vol. 1763). [050001] American Institute of Physics Inc.. https://doi.org/10.1063/1.4961354