Tribological behavior of nano-undulated surface of diamond-like carbon films

Se Jun Park, Kwang Ryeol Lee, Dae Hong Ko

Research output: Contribution to journalConference article

21 Citations (Scopus)


Tribological behavior of nano-undulated diamond-like carbon (DLC) films of the surface roughness ranging from 0.6 to 13.7 nm was investigated in an ambient air of 50% relative humidity. The nano-undulated DLC films were prepared by radio frequency plasma-assisted chemical vapor deposition (r.f.-PACVD) using nanosized Ni dots on a Si (100) substrate. The friction coefficient between the DLC film and the steel ball was characterized by a ball-on-disk type wear rig. Auger and Raman spectroscopy analysis of the debris revealed that the tribochemical reaction with environment was significantly suppressed as the surface roughness increased. Even if the rough surface increased the wear rate of the steel ball and thus the concentration of Fe in the debris, neither the oxidation of Fe nor the graphitization of the carbon in the debris occurred on the rough surface. However, the frictional behavior was affected by several factors: the composition and the size of debris, plowing effect of the rough surface, and the presence of the transfer layer on the wear scar surface.

Original languageEnglish
Pages (from-to)1291-1296
Number of pages6
JournalDiamond and Related Materials
Issue number8
Publication statusPublished - 2005 Aug 1
EventSMAC '04 Conference Proceedings S. I. -
Duration: 2004 Sep 92004 Sep 10

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Chemistry(all)
  • Mechanical Engineering
  • Materials Chemistry
  • Electrical and Electronic Engineering

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