| 摘要 |
PROBLEM TO BE SOLVED: To reduce wear of a mate member in a piston ring having a cermet spray film composed of a hard ceramics phase and a metallic phase on at least a slide face of the piston ring of an internal combustion engine. SOLUTION: In this piston ring, the hard ceramics phase has area rate of 60 to 90%, and particle diameter is 5μm or less. The metallic phase is composed of an alloy phase containing molybdenum, cobalt, nickel or chrome or one kind or more of them as main component. Porosity of the cermet spray film is set to be≤1%. COPYRIGHT: (C)2005,JPO&NCIPI
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