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    2-3 Adhesion of Metals in High Vacuum

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    The adhesion or cold welding behavior of a variety of metals and alloys was investigated in the temperature interval 20°–150°C in which diffusion enhanced bonding generally was negligible. The tests were performed at vacuum levels below 1 × 10−8 torr to ensure that surface oxides, disrupted or removed by vibratory abrasion, would not readsorb monolayer films within the surface exposure time. The efficiency or effectiveness of metallic contact adhesion, determined as the ratio of the interfacial rupture stress Sr to the compressive yield strength, Sy was related to physical properties including plastic deformation rate, yield strength and lattice structure.

    Author Information:

    Hordon, M. J.
    National Research Corporation,

    Committee/Subcommittee: C24.30

    DOI: 10.1520/STP45160S