Nanometer-scale tunnel formation in metallic glass by helium ion irradiation

Lin Shao, Brian P. Gorman, Assel Aitkaliyeva, N. David Theodore, Guoqiang Xie

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    10 Citations (Scopus)


    We have shown that upon high fluence helium ion irradiation, metallic glass Cu 50Zr 45Ti 5 becomes highly porous at the depth of the helium projected range. The resulting porous region is characterized by the formation of a tunnel like structure and self-linkage of nanometer size gas bubbles. Furthermore, the irradiation leads to the formation of nanometer size Cu xZr y crystals that are randomly distributed. The results of this study indicate that the He-filled bubbles have attractive interactions and experience considerable mobility. Movement of the bubbles is believed to be assisted by ballistic collisions.

    Original languageEnglish
    Article number041901
    JournalApplied Physics Letters
    Issue number4
    Publication statusPublished - 2012 Jul 23

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)


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