Title:
PISTON RING
Document Type and Number:
Japanese Patent JP2004190560
Kind Code:
A
Abstract:
To prevent chipping and exfoliation of an amorphus hard carbon film covering a piston ring.
Nitriding layer 2 formed by the radical nitriding method using ammonia gas and hydrogen gas, and an intermediate layer of metal or carbide and the amorphus hard carbon film 3 are successively formed on a matrix material 1 comprising Cr-containing ferrous alloy.
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Inventors:
Moronuki, Masaki
Application Number:
JP2002000358952
Publication Date:
July 08, 2004
Filing Date:
December 11, 2002
Export Citation:
Assignee:
RIKEN CORP
International Classes:
F02F5/00; F16J9/26; F02F5/00; F16J9/26; (IPC1-7): F02F5/00; F16J9/26