Composite plating film and a process for forming the same
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsOsamu Ishigami, Tomohiro Hirata, Yoshimitsu Ogawa, Nobuhiko Yoshimoto
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Abstract
A composite nickel and copper alloy plating film (3) containing nickel and copper. Nickel is of high wear resistance and a nickel alloy improves the wear resistance of the film. Copper is of high resistance of the film. The film may further contain self-lubricating particles and hard particles which ensure its wear resistance and lubricating property to a further extent.
Claims19
A composite plating film covering a base surface and consisting essentially of a composite nickel and copper alloy film composed of nickel and copper, wherein the alloy film comprises an alternate array of nickel and copper alloy layers, each nickel alloy layer containing less than 50% of copper with nickel and each copper layer containing less than 50% of nickel with copper, the film having a surface roughened to a roughness of one to three microns as expressed by maximum height (Rmax) to have the nickel and copper alloys exposed substantially uniformly therein.
A composite plating film covering a base surface and consisting essentially of a composite nickel and copper alloy film composed of nickel and copper, wherein the alloy film contains 10 to 50 atm. % of copper, nickel, self-lubricating particles and hard particles.
A plating film on an inner wall surface of a cylinder in an infernal combustion engine, comprising:
- a composite nickel and copper alloy film, wherein the alloy film contains 10 to 50 atm. % of copper, nickel, self-lubricating particles and hard particles.
A composite plating film covering a base surface and comprising a composite nickel and copper alloy film that includes alternating nickel alloy layers and copper alloy layers, wherein each nickel alloy layer includes copper, and each copper alloy layer includes nickel, the film having a surface roughened to a roughness of one to three microns as expressed by maximum height (Rmax) to have the nickel and copper alloys exposed substantially uniformly therein.
Dependencies are inferred from the claim text.