Lubricant composition for initial break-in, sliding member, and sliding member manufacturing method
AssigneeDaicel Corporation
InventorsNorihiro Kimoto, Tomohiro Goto, Hiroki Kageyama
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Abstract
Provided is an initial break-in lubricant composition capable of easily and economically reducing the coefficient of friction of a sliding portion. The initial break-in lubricant composition includes an organic dispersion medium and nanocarbon particles in a quantity from 0.1 to 2000 ppm by mass. The nanocarbon particles are preferably particles of one or more nanocarbon material(s) selected from the group consisting of: nanodiamonds, fullerenes, graphene oxide, nanographite, carbon nanotubes, carbon nanofilaments, onion-like carbon, diamond-like carbon, amorphous carbon, carbon black, carbon nanohorns, and carbon nanocoils.
Claims10
A sliding member comprising a base material and an iron oxide film provided on a surface of the base material,
- the iron oxide film including carbon having, in a spectrum obtained through TEM-EELS measurements, a pi star (π*) peak observed in a loss energy range from 280 to 290 eV, and sigma star (σ*) peaks observed in a loss energy range from 290 to 295 eV, a loss energy range from 295 to 300 eV, and a loss energy range from 302 to 310 eV, respectively,
- wherein carbon or carbon compound that is constituted by the carbon is dispersed in an iron oxide matrix, and the carbon comprises carbon derived from diamond and carbon derived from a carbon material other than diamond.
A method of manufacturing a sliding member including an iron-made base material and an iron oxide film that is provided on a surface of the iron-made base material, the method comprising:
- sliding the iron-made base material and an iron-made body against each other in the presence of a nanodiamond dispersion composition including an organic dispersion medium and nanodiamond particles so as to form the iron oxide film, wherein a ratio of a content of the nanodiamond particles in the nanodiamond dispersion composition is from 0.1 to 500 ppm by mass.
Dependencies are inferred from the claim text.