Sliding member, manufacturing method thereof, and coating film
AssigneeNippon Piston Ring Co., Ltd.
InventorsHiroyuki Sugiura, Takahiro Okazaki
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AssigneeNippon Piston Ring Co., Ltd.
InventorsHiroyuki Sugiura, Takahiro Okazaki
Estimating the term…
A sliding member including a coating film in a sliding surface on a base material. The coating film includes, when a cross section thereof is observed by a bright-field TEM image, a laminated part configured by laminating, in a thickness direction, repeating units including black hard carbon layers and white hard carbon layers and a surface layer part composed of a white hard carbon layer provided on the laminated part. A Vickers hardness of the black hard carbon layer is within a range of 700 to 1600 HV, a Vickers hardness of the white hard carbon layer is higher than a Vickers hardness of the black hard carbon layer adjacent thereto and within a range of 1200 to 2200 HV, and a Vickers hardness of the surface layer part is lower than the Vickers hardness of the white hard carbon layer and within a range of 800 to 1200 HV.
A sliding member comprising:
A coating film comprising:
Dependencies are inferred from the claim text.