Tribology Online (Sep 2010)

Influences of Film Deposition Condition on Friction of Diamond-Like Carbon Film: A Theoretical Investigation

  • Tasuku Onodera,
  • Takanori Kuriaki,
  • Shandan Bai,
  • Ryo Nagumo,
  • Ryuji Miura,
  • Ai Suzuki,
  • Hideyuki Tsuboi,
  • Nozomu Hatakeyama,
  • Akira Endou,
  • Hiromitsu Takaba,
  • Momoji Kubo,
  • Akira Miyamoto

DOI
https://doi.org/10.2474/trol.5.173
Journal volume & issue
Vol. 5, no. 3
pp. 173 – 180

Abstract

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We theoretically investigated influences of film deposition condition on a friction of diamond-like carbon (DLC) film using our developed molecular dynamics method. The method can deal with chemical reactions on the basis of our original stochastic equation. DLC slab model was firstly constructed, and carbon atoms were deposited onto its surface with various kinetic energies (1, 10 and 30 eV) to mimic physical vapor deposition process. Lower sp3 carbon concentration and density were obtained for the 1 eV case and “subplantation” phenomenon was found for each model. The dynamical friction of the deposited DLC film/iron oxide combination was also simulated. The friction coefficient for the deposited film with kinetic energy of 1 eV was much lower than that of 10 and 30 eV cases due to the friction-induced structural change. The simulations provided us an important insight on DLC film preparation to achieve low friction regime.

Keywords