Friction properties of partially polished CVD diamond films at different sliding speeds

Hiroyuki Miki, Atsushi Tsutsui, Takanori Takeno, Toshiyuki Takagi

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


The rate dependence of the friction properties between a partially polished diamond film and metal has been investigated experimentally in the present research. Partially polished diamond films have low friction and low wear properties in air, and it is expected that the friction coefficient becomes very small at high sliding speeds. Polycrystalline diamond films are deposited on SiC substrates by hot filament chemical vapor deposition using a gas mixture of CH 4 and H 2. Partially polished diamond films of two different surface roughnesses, as well as the as-deposited diamond film, were tested under different sliding speed conditions. The friction properties between the diamond films and an AISI440C pin under dry conditions were determined in ambient atmosphere. For the polished films, a definite reduction in the friction coefficient was observed as the sliding speed increased; the speed at which this reduction began depended on the surface roughness of the film. Extremely low friction and noiseless sliding between films and counter metals were realized on polished diamonds as the sliding speeds increased.

Original languageEnglish
Pages (from-to)167-170
Number of pages4
JournalDiamond and Related Materials
Publication statusPublished - 2012 Apr


  • CVD diamond
  • Hydrodynamic lubrication
  • Partly polished surface
  • Plateau structure
  • Tribology

ASJC Scopus subject areas

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


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