Metal–Metal Joining by Unusual Wetting on Surface Fine Crevice Structure Formed by Laser Treatment

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Author(s)

Abstract

We have investigated metal–metal joining using “unusual wetting”, in which a liquid metal spreads by capillary action on a porous metal surface layer formed under atmospheric oxidation–reduction. Although oxidation–reduction creates an adequate porous structure for “unusual wetting”, it is difficult to subject only a specific area to atmospheric oxidation–reduction treatment, and region-selective “unusual wetting” and joining are not achieved. In this work, we propose the use of laser, which is able to treat regions selectively, to form a suitable structure for “unusual wetting”. A fine asperity structure was observed on the Cu substrate surface after laser treatment. This structure was termed a “surface fine crevice structure”. The wettability of the laser-treated Cu substrate by liquid Bi was determined to confirm region-selective “unusual wetting” on the “surface fine crevice structure”. We also joined two Cu substrates by “unusual wetting” after creating a “surface fine crevice structure”.

Journal

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 56(11), 1852-1856, 2015

    The Japan Institute of Metals and Materials

Codes

  • NII Article ID (NAID)
    130005104251
  • NII NACSIS-CAT ID (NCID)
    AA1151294X
  • Text Lang
    ENG
  • ISSN
    1345-9678
  • NDL Article ID
    026830769
  • NDL Call No.
    Z53-J286
  • Data Source
    NDL  J-STAGE 
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