Title:
硬質炭素皮膜
Document Type and Number:
Japanese Patent JP6494505
Kind Code:
B2
Abstract:
A piston ring having a hard carbon coating film is provided that can be easily formed in the same batch, does not cause delamination, and is excellent in initial running-in and wear resistance. A hard carbon coating film is formed at least on an outer peripheral sliding surface of a piston ring base and contains substantially no hydrogen, wherein the hard carbon coating film has an sp 2 content ratio ranging from 40% to 80% measured in a TEM-EELS spectrum where transmission electron microscopy (TEM) and electron energy-loss spectroscopy (EELS) are combined together, and an area ratio of contained macro particles on a surface of the hard carbon coating film ranges from 0.1% to 10.0%.
Inventors:
Takuya Ozaki
Hiroyuki Sugiura
Hiroyuki Sugiura
Application Number:
JP2015503026A
Publication Date:
April 03, 2019
Filing Date:
February 27, 2014
Export Citation:
Assignee:
Nippon Piston Ring Co., Ltd.
International Classes:
C23C14/06; F16J9/26; F02F5/00
Domestic Patent References:
| JP2008297477A | ||||
| JP2006057674A | ||||
| JP2012202522A | ||||
| JP2007232026A | ||||
| JP2008286354A | ||||
| JP2010202945A | ||||
| JP2012527583A |
Attorney, Agent or Firm:
Patent Business Corporation Intect International Patent Office
Yoshinori Ishibashi
Yoshinori Ishibashi