Preparation and surface modification of submicron YAl2 particles by mixed milling with magnesium for fabricating YAl2p/MgLiAl composites

Q. Q. Zhang, G. Q. Wu, W. Sha, Z. Huang, Y. Tao

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    3 Citations (Scopus)
    207 Downloads (Pure)

    Abstract

    A new process for the preparation and surface modification of submicron YAl2 intermetallic particles was proposed to control the agglomeration of ultrafine YAl2 particles and interface in the fabrication of YAl2p/MgLiAl composites. The morphological and structural evolution during mechanical milling of YAl2 powders (< 30 μm) with magnesium particles (~ 100 μm) has been characterized by scanning electron microscopy, transmission electron microscopy, and X-ray diffraction. The results show that YAl2 particles are refined to submicron scale and separately cladded in magnesium coatings after mixed milling with magnesium particles for 20 h. Mechanical and metallurgical bonds have been found in YAl2/Mg interfaces without any interface reactions. Both the refining and mechanical activation efficiencies for YAl2 particles are enhanced, which may be related to the addition of magnesium particles leading to atomic solid solution and playing a role as “dispersion stabilizer”.
    Original languageEnglish
    Pages (from-to)209–214
    Number of pages6
    JournalPowder Technology
    Volume262
    Early online date28 Apr 2014
    DOIs
    Publication statusPublished - Aug 2014

    Keywords

    • Magnesium alloys
    • composites
    • Intermetallics
    • Electron microscopy
    • Bonding
    • interfaces

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