Sliding member and manufacturing method thereof
AssigneeTeikoku Piston Ring Co., Ltd.
InventorsTakatsugu Iwashita, Nobuyuki Yamashita
Life of this patent
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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.
Claims5
A sliding member having a diamond-like carbon film on a sliding surface of said sliding member, wherein said 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, and a mating material for said sliding member is made of aluminum alloy.
Dependencies are inferred from the claim text.