Pin-on-disk characterization of amorphous carbon films prepared by filtered cathodic vacuum arc technique

B. K. Tay, D. Sheeja, Y. S. Choong, Shu Ping Lau, X. Shi

Research output: Journal article publicationConference articleAcademic researchpeer-review

20 Citations (Scopus)

Abstract

The frictional behaviour of tetrahedral amorphous carbon (ta-C) films, prepared by filtered cathodic vacuum arc (FCVA) technique, is characterized by a pin-on-disk tribometer. The influence of different test conditions, such as applied load, static sliding partners (steel, sapphire and silicon nitride balls) and test environment (nitrogen, oxygen and low/high humidity), on the frictional behaviour of ta-C films was investigated. In general, a lower average coefficient of friction was observed with increase in applied load for all the different static partners. A lower coefficient of friction was obtained when the ta-C films slid against a sapphire ball, as compared to other ball materials under the same applied load. This may be due to the interfacial film, which strongly depends on the reactive species such as oxygen, hydrogen, etc. in the surrounding with sliding partner. Ta-C films tested in an inert low humidity nitrogen environment recorded the lowest coefficient of friction. This shows the effect of tribochemical interaction of the gaseous species in the surrounding environment on the frictional behaviour of the ta-C film. The influence of different humidity on the frictional behaviour of the ta-C films was also investigated. A lower humidity leads to increased coefficient of friction.
Original languageEnglish
Pages (from-to)819-824
Number of pages6
JournalDiamond and Related Materials
Volume9
Issue number3-6
DOIs
Publication statusPublished - 1 Apr 2000
Externally publishedYes
Event10th European Conference on Diamond, Diamond-like Materials, Carbon Nanotubes, Nitrides and Silicon Carbide - Prague, Czech Republic
Duration: 12 Sep 199917 Sep 1999

Keywords

  • Cathodic arc
  • Diamond-like carbon
  • Friction coefficient
  • Pin-on-disk tribometer

ASJC Scopus subject areas

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

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