The Sliding Characteristics of Ag–Graphite Composite Plating

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  • Doi Tatsuhiro
    Technology Center, Metal Processing Business Unit, DOWA METALTECH CO., LTD.
  • Kato Yukiya
    Technology Center, Metal Processing Business Unit, DOWA METALTECH CO., LTD.
  • Kotani Hirotaka
    Technology Center, Metal Processing Business Unit, DOWA METALTECH CO., LTD.
  • Tomiya Takao
    Technology Center, Metal Processing Business Unit, DOWA METALTECH CO., LTD.
  • Narieda Hiroto
    Technology Center, Metal Processing Business Unit, DOWA METALTECH CO., LTD.

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Other Title
  • 銀–グラファイト複合めっき膜の摺動特性
  • ギン-グラファイト フクゴウメッキ マク ノ シュウドウ トクセイ

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<p>We investigated the effect of graphite on sliding characteristics of Ag–Graphite composite plating. Friction coefficient and contact resistivity were measured during the sliding test. We also observed test samples after the sliding test. It was found that excellent sliding characteristics of Ag–Graphite composite plating are achieved by graphites in the sliding area which inhibit the adhesion of Ag plating. Graphites existing on the plating surface have a lowering effect on insertion force, but the effect gradually decreases with removal of graphites by sliding. Graphites inside the plating also have some lowering effect on insertion force, and its effect sustains during the sliding test for more than 20000 times. Considering the contact reliability of Ag–Graphite composite plating, although graphites exist on the surface, contact resistance was low since silver is exposed in some parts. From above, Ag–Graphite composite plating is expected to be applied to terminals that require high reliability.</p>

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