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US 12,631,215 B2Granted
Sliding components
AssigneeEagle Industry Co., Ltd.
InventorMinehiro Arai
Life of this patent
Estimating the term…
Abstract
Provided are sliding components capable of obtaining a stable low-friction effect under a wide range of conditions of use. A sliding component has a relatively sliding surface. A base material of one of the sliding components is coated with a graphite film, and the sliding surface of the other of the sliding components is made of the graphite film.
Claims18
Sliding components having sliding surfaces sliding relative to each other,
- wherein a base material of one of the sliding components is coated with a graphite film and the sliding surface of the one of the sliding components is made of the graphite film,
- the base material is formed of ceramics,
- the graphite film is brought into contact with the base material,
- the graphite film has a thickness larger than an arithmetic mean roughness Ra of a surface of the base material,
- the graphite film has a hexagonal crystal structure,
- the graphite film has a ratio of a surface area of graphitized portion with respect to all of the surface area of the graphite film of 50% to 90%, and
- the graphite film contains glassy carbon.
4 more elements
Sliding components having sliding surfaces sliding relative to each other,
- wherein a base material of one of the sliding components is coated with a graphite film and the sliding surface of the one of the sliding components is made of the graphite film,
- the base material is formed of ceramics,
- the graphite film is brought into contact with the base material,
- an arithmetic mean roughness Ra of a surface of the base material is 0.1 μm or more,
- the graphite film has a hexagonal crystal structure,
- the graphite film has a ratio of a surface area of graphitized portion with respect to all of the surface area of the graphite film of 50% to 90%, and
- the graphite film contains glassy carbon.
4 more elements
Sliding components having sliding surfaces sliding relative to each other,
- wherein a base material of one of the sliding components is coated with a graphite film and the sliding surface of the one of the sliding components is made of the graphite film,
- the graphite film is lower in hardness than the base material,
- the graphite film has a hexagonal crystal structure,
- the graphite film has a ratio of a surface area of graphitized portion with respect to all of surface of the graphite film of 50% to 90%, and
- the graphite film contains glassy carbon.
2 more elements
Dependencies are inferred from the claim text.