Sliding member, manufacturing method thereof, and coating film

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United States of America Patent

PATENT NO 11946010
APP PUB NO 20220396746A1
SERIAL NO

17764768

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Importance

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Abstract

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To provide a sliding member comprising a coating film exhibiting constant and stable chipping resistance and wear resistance and excellent in peeling resistance (adhesion), and the coating film thereof. The above-described problem is solved by a sliding member (10) comprising a coating film (1) on a sliding surface (16) on a base material (11). The coating film (1) has, when a cross section thereof is observed by a bright-field TEM image, a total thickness within a range of 1 μm to 50 μm, in repeating units including black hard carbon layers (B), relatively shown in black, and white hard carbon layers (W), relatively shown in white, and laminated in a thickness direction (Y). In the black hard carbon layer (B) and the white hard carbon layer (W) adjacent to each other, the white hard carbon layer (W) has higher hardness and a larger [sp2/(sp2+sp3)] ratio than the black hard carbon layer (B).

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Patent Owner(s)

Patent OwnerAddress
NIPPON PISTON RING CO LTDSAITAMA-SHI SAITAMA 338-8503

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Okazaki, Takahiro Saitama, JP 23 113
Sugiura, Hiroyuki Saitama, JP 86 589

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