Influence of DLC coating thickness on tribological characteristics under sliding rolling contact condition

Masahiro Fujii, M. Ananth Kumar, Akira Yoshida

Research output: Contribution to journalArticle

12 Citations (Scopus)


Diamond-like-carbon (DLC) coating of thickness 3 and 10 μm were developed with and without radical nitriding pretreatment on steel rollers and spur gear pair. The friction coefficient and wear amount were evaluated under sliding rolling contact condition in vacuum and under oil lubrication. Delamination of coatings was observed at the interface of the substrate. The wear resistance of coatings improved with the thickness of the coating. In vacuum both the roller and the gear pair of 10 μm coating thickness with radical nitriding showed identical wear behavior. The radical nitriding seemed to enhance the life of DLC coatings.

Original languageEnglish
Pages (from-to)1289-1295
Number of pages7
JournalTribology International
Issue number11
Publication statusPublished - Oct 2011



  • Coating thickness
  • DLC
  • Rollers
  • Spur gear

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

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