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Publication Detail
Structure and nano-mechanical characteristics of surface oxide layers on a metallic glass
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Article
  • Authors:
    Caron A, Qin CL, Gu L, Gonzalez S, Shluger A, Fecht HJ, Louzguine-Luzgin DV, Inoue A
  • Publisher:
    IOP PUBLISHING LTD
  • Publication date:
    04/03/2011
  • Journal:
    NANOTECHNOLOGY
  • Volume:
    22
  • Issue:
    9
  • Print ISSN:
    0957-4484
  • Language:
    EN
  • Keywords:
    SUPERCOOLED LIQUID, AMORPHOUS-ALLOYS, FILMS, DEVITRIFICATION, DEFORMATION, SIMULATIONS, OXIDATION, BEHAVIOR, SILICON
  • Addresses:
    Caron, A
    Tohoku Univ
    WPI Adv Inst Mat Res
    Sendai
    Miyagi
    9808577
    Japan

    Hebei Univ Technol
    Sch Mat Sci & Engn
    Tianjin
    300130
    Peoples R China

    UCL
    Dept Phys & Astron
    London
    WC1E 6BT
    England

    Univ Ulm
    Inst Micro & Nanomat
    D-89081
    Ulm
    Germany

    Res Ctr Karlsruhe
    Inst Nanotechnol
    D-76021
    Karlsruhe
    Germany
Abstract
Owing to their low elastic moduli, high specific strength and excellent processing characteristics in the undercooled liquid state, metallic glasses are promising materials for applications in micromechanical systems. With miniaturization of metallic mechanical components down to the micrometer scale, the importance of a native oxide layer on a glass surface is increasing. In this work we use TEM and XPS to characterize the structure and properties of the native oxide layer grown on Ni62Nb38 metallic glass and their evolution after annealing in air. The thickness of the oxide layer almost doubled after annealing. In both cases the oxide layer is amorphous and consists predominantly of Nb oxide. We investigate the friction behavior at low loads and in ambient conditions (i.e. at T = 295 K and 60% air humidity) of both as-cast and annealed samples by friction force microscopy. After annealing the friction coefficient is found to have significantly increased. We attribute this effect to the increase of the mechanical stability of the oxide layer upon annealing.
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