Sliding member and manufacturing method thereof
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United States of America Patent
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Aug 28, 2001
Grant Date -
N/A
app pub date -
Jul 13, 1999
filing date -
Oct 15, 1998
priority date (Note) -
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Abstract
A piston ring is formed over the entire surface with a gas nitrided layer. A diamond-like carbon film is formed in a thickness of 0.5 to 30 micrometers over the gas nitrided layer at the upper and lower surfaces. The diamond-like carbon film has a surface structure in which diamond-like carbon has been deposited in nodular shapes in sizes of 0.5 to 5 micrometers. The diamond-like carbon is configured with any one of an amorphous carbon structure, an amorphous carbon structure having partly a diamond structure, or an amorphous carbon structure having partly a graphite structure.
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