SLIDING MEMBER AND PISTON RING

Title:

SLIDING MEMBER AND PISTON RING

Document Type and Number:

WIPO Patent Application WO/2021/140851

Kind Code:

A1

Abstract:

Provided is a sliding member which has a DLC film with excellent heat resistance, by which high abrasion resistance can be achieved regardless of whether a lubricating oil contains an organic molybdenum-based compound, and by which a low friction coefficient can be achieved. A sliding member 100 according to the present disclosure has: a substrate 10; and an amorphous carbon film 20 which is formed on the substrate 10 and has a surface 20A as a sliding surface. The present disclosure is characterized in that, on the surface 20A of the amorphous carbon film, a first region 18A having a component composition which does not substantially contain hydrogen and contains 2-20 at% of silicon and 2-15 at% of boron, with the remainder consisting of carbon coexists with a second region 18B having a component composition which does not substantially contain hydrogen and consists of carbon, and when, on the surface 20A, the area of the first region 18A is defined as A, and the area of the second region 18B is defined as B, B/(A+B) is 0.05-0.40.

Inventors:

TAKAYA MASAAKI (JP)
DENG XINGRUI (JP)
SHIMA YUJI (JP)

Application Number:

PCT/JP2020/046832

Publication Date:

July 15, 2021

Filing Date:

December 15, 2020

Export Citation:

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Assignee:

KK RIKEN (JP)

International Classes:

F16J9/26; C23C14/06

Foreign References:

JP2008286354A	2008-11-27
JP2015193918A	2015-11-05
JPH1192935A	1999-04-06
JP2012530188A	2012-11-29