Invention Grant
- Patent Title: Sliding member and coating film
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Application No.: US16624781Application Date: 2018-06-15
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Publication No.: US11293548B2Publication Date: 2022-04-05
- Inventor: Takahiro Okazaki , Yoshihiro Ito , Hiroyuki Sugiura , Shinya Kanazawa , Hideki Moriguchi , Akinori Shibata , Takehiko Ooshiro
- Applicant: NIPPON PISTON RING CO., LTD. , NIPPON ITF, INC.
- Applicant Address: JP Saitama; JP Kyoto
- Assignee: NIPPON PISTON RING CO., LTD.,NIPPON ITF, INC.
- Current Assignee: NIPPON PISTON RING CO., LTD.,NIPPON ITF, INC.
- Current Assignee Address: JP Saitama; JP Kyoto
- Agency: Sughrue Mion, PLLC
- Priority: JPJP2017-120461 20170620
- International Application: PCT/JP2018/023026 WO 20180615
- International Announcement: WO2018/235750 WO 20181227
- Main IPC: F16J9/26
- IPC: F16J9/26 ; C01B32/05 ; C23C14/16 ; C23C14/32

Abstract:
A sliding member (10) including a coating film (1) composed of a hard carbon layer on a sliding surface (16) of a base material (11). The coating film has, when a cross section thereof is observed by a bright-field TEM image, a thickness within a range of 1 μm to 50 μm, and is configured by 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, and comprise an inclined region, provided on a base material side, where thicknesses of white hard carbon layers (W) of the repeating units gradually increase in a thickness direction, and a homogeneous region\, provided on a surface side of the sliding member, where thicknesses of the white hard carbon layers (W) of the repeating units are the same or substantially the same in the thickness direction.
Public/Granted literature
- US20200217416A1 SLIDING MEMBER AND COATING FILM Public/Granted day:2020-07-09
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