Title:
PISTON RING AND PROCESS FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2015/121944
Kind Code:
A1
Abstract:
Provided are a piston ring which, even when a sleeve constituted of an aluminum alloy is used, can sufficiently show the required low frictional properties, wear resistance, and low counterpart-material attacking properties, and a process for producing the piston ring. The piston ring has a rigid carbon film formed as the outermost layer thereof and serving as a sliding surface with a sleeve constituted of an aluminum alloy, wherein the rigid carbon film gives an X-ray diffraction pattern that has peaks assigned to graphite crystals. The rigid carbon film of the piston ring is formed using a chemical vapor deposition method. The rigid carbon film of the piston ring has a hydrogen content which is at least 20 atm% but lower than 30 atm%, and gives a Raman spectrum in which the ratio of the area (ID) of D-band peaks to the area (IG) of G-band peaks, ID/IG, is 0.5-2.0.
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Inventors:
OOSHIRO TAKEHIKO (JP)
MIYAKE KOJI (JP)
YOSHIDA SATOSHI (JP)
FUJIMAGARI EISHI (JP)
YAMASAKI TAKEYUKI (JP)
CHIBA HIDETOSHI (JP)
MIYAKE KOJI (JP)
YOSHIDA SATOSHI (JP)
FUJIMAGARI EISHI (JP)
YAMASAKI TAKEYUKI (JP)
CHIBA HIDETOSHI (JP)
Application Number:
PCT/JP2014/053327
Publication Date:
August 20, 2015
Filing Date:
February 13, 2014
Export Citation:
Assignee:
NIPPON ITF INC (JP)
HONDA MOTOR CO LTD (JP)
HONDA MOTOR CO LTD (JP)
International Classes:
F16J9/26; C23C16/26
Domestic Patent References:
| WO2011034026A1 | 2011-03-24 |
Foreign References:
| JP2006057674A | 2006-03-02 | |||
| JP2010202945A | 2010-09-16 | |||
| JP2006022666A | 2006-01-26 |
Attorney, Agent or Firm:
JODAI, Tetsuji et al. (JP)
Tetsuji Ueshiro (JP)
Tetsuji Ueshiro (JP)
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