Frictional characteristics of coating layer in diesel engine piston ring

디젤엔진 피스톤 링 코팅 층의 마찰특성

  • 장정환 (부산대학교 기계공학부/정밀정형 및 금형가공 연구소) ;
  • 주병돈 (부산대학교 기계공학부/정밀정형 및 금형가공 연구소) ;
  • 이호진 (부산대학교 기계공학부/정밀정형 및 금형가공 연구소) ;
  • 김은화 (부산대학교 기계공학부/정밀정형 및 금형가공 연구소) ;
  • 문영훈 (부산대학교)
  • Published : 2009.05.07

Abstract

The frictional behaviors of Cermets/Cr-Ceramics and Cu-Al coatings of piston ring were investigated. Friction tests were carried out by pin-on-disk test and materials properties of coating layer were analyzed by nano indentation tester. Higher friction coefficient was obtained at harder coating with rougher surface. In case of hard-coating, the scratch depth, width and pile-up height had close relationship with indentation hardness. So the scratch width, depth and pile-up height increases with decreasing friction coefficient. But in case of soft-coating, the friction coefficients are strongly dependent on the morphological characteristics after nano scratching more than indentation hardness.

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