Smoothing metallic glasses without introducing crystallization by gas cluster ion beam

Lin Shao, Di Chen, Michael Myers, Jing Wang, Buddhi Tilakaratne, Dharshana Wijesundera, Wei Kan Chu, Guoqiang Xie, Arezoo Zare, Don A. Lucca

    研究成果: Article査読

    10 被引用数 (Scopus)

    抄録

    We show that 30 keV Ar cluster ion bombardment of Ni52.5Nb 10Zr15Ti15Pt7.5 metallic glass (MG) can remove surface mountain-like features and reduce the root mean square surface roughness from 12 nm to 0.7 nm. X-ray diffraction analysis reveals no crystallization after cluster ion irradiation. Molecular dynamics simulations show that, although damage cascades lead to local melting, the subsequent quenching rate is a few orders of magnitude higher than the critical cooling rate for MG formation, thus the melted zone retains its amorphous nature down to room temperature. These findings can be applied to obtain ultra-smooth MGs without introducing crystallization.

    本文言語English
    論文番号101604
    ジャーナルApplied Physics Letters
    102
    10
    DOI
    出版ステータスPublished - 2013 3月 11

    ASJC Scopus subject areas

    • 物理学および天文学(その他)

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