Nanoscale icosahedral quasicrystal phase precipitation mechanism during annealing for Mg-Zn-Gd-based alloys

Yuan Tian, Hua Huang, Guangyin Yuan, Chunlin Chen, Zhongchang Wang, Wenjiang Ding

    Research output: Contribution to journalArticlepeer-review

    22 Citations (Scopus)

    Abstract

    We have performed a systematic transmission electron microscopy study of precipitated particles in Mg-Zn-Gd-based alloys after annealing. We find that the Mg-Zn phases and ellipsoidal-shaped icosahedral quasicrystal phases (I-phase) are precipitated and distributed by partition in the grains, which can be attributed to the composition segregation of the alloying elements in the as-cast alloys. The content of alloying element is found to be crucial to the precipitation of nanoscale I-phase. The nanoscale I-phase ranges in size from a few to dozens of nanometers, revealing that the precipitation process satisfies the classical nucleation and growth theory.

    Original languageEnglish
    Pages (from-to)236-239
    Number of pages4
    JournalMaterials Letters
    Volume130
    DOIs
    Publication statusPublished - 2014 Sep 1

    Keywords

    • Magnesium
    • Metals and alloys
    • Microstructure
    • Quasicrystalline
    • Segregation

    ASJC Scopus subject areas

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

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