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US 10,883,601 B2Granted
Sliding member and piston ring
OwnerXingrui Denginventor
Life of this patent
Estimating the term…
Abstract
A sliding member includes a base material, and an amorphous hard carbon film formed on a surface of the base material, in which a sp2 ratio of the amorphous hard carbon film increases from an inner surface side corresponding to the base material side toward an outer surface side thereof to become a maximum value and further decreases toward the outer surface side.
Claims16
A sliding member comprising:
- a base material;
- and
- an amorphous hard carbon film formed on a surface of the base material,
- wherein a sp2 ratio of the amorphous hard carbon film increases from an inner surface side adjacent to the base material toward an outer surface side thereof to become a maximum value and further decreases toward the outer surface side, the sp2 ratio indicating a sp2/(sp2+sp3) ratio of a sp2 bond with respect to the sp2 bond and a sp3 bond of the amorphous hard carbon film, and
- wherein the sp2 ratio of the inner surface side of the amorphous hard carbon film is smaller than 40%, the maximum value of the sp2 ratio of the amorphous hard carbon film is 70% or less, and the sp2 ratio of the outer surface side of the amorphous hard carbon film is 50% or less.
2 more elements
A sliding member comprising:
- a base material;
- and
- an amorphous hard carbon film formed on a surface of the base material,
- wherein a sp2 ratio of the amorphous hard carbon film increases from an inner surface side adjacent to the base material toward an outer surface side thereof to become a maximum value and further decreases toward the outer surface side in a continuous manner, the sp2 ratio indicating a sp2/(sp2+sp3) ratio of a sp2 bond with respect to the sp2 bond and a sp3 bond of the amorphous hard carbon film.
1 more element
A sliding member comprising:
- a base material;
- and
- an amorphous hard carbon film formed on a surface of the base material,
- wherein a sp2 ratio of the amorphous hard carbon film increases from an inner surface side adjacent to the base material toward an outer surface side thereof to become a maximum value and further decreases toward the outer surface side in a stepwise manner, the sp2 ratio indicating a sp2/(sp2+sp3) ratio of a sp2 bond with respect to the sp2 bond and a sp3 bond of the amorphous hard carbon film.
1 more element
Dependencies are inferred from the claim text.