Sliding wear of silicon carbide modified by etching with chlorine at various temperatures

H. J. Choi, H. T. Bae, J. K. Lee, B. C. Na, M. J. McNallan, Dae-Soon Lim

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22 Citations (Scopus)

Abstract

The effect of reaction temperature on the formation of a carbon layer on the surface of SiC has been investigated. Subsequently, the tribological properties of the formed carbon layers were studied. The experimental procedure involved exposing reaction-bonded SiC balls to a flowing gas mixture of 5% Cl2, 2.5% H2, and Ar at a high temperature of 800, 1000, or 1200 °C. A ball-on disk tribometer was used to investigate the friction and wear behavior of the treated specimens. While partially unreacted SiC phases were observed in the layer modified at 800 °C, rhombohedral graphite crystals were formed in the layer modified at 1200 °C. Compared to untreated SiC, the treated SiC materials were found to have relatively low friction coefficients and better wear resistance. Increasing the treatment temperature was found to improve the tribological performance of the resulting surface-modified SiC balls. A possible reason for this tribological improvement has been discussed based on the observed carbon phases.

Original languageEnglish
Pages (from-to)214-219
Number of pages6
JournalWear
Volume266
Issue number1-2
DOIs
Publication statusPublished - 2009 Jan 5

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Keywords

  • Chlorination
  • Frictional coefficient
  • Nanoindentation
  • Rhombohedral graphite
  • Silicon carbide

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Mechanics of Materials

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