Friction and wear of self-mated SiC and Si3N4 sliding in water

M. Chen, K. Kato, K. Adachi

Research output: Contribution to journalArticlepeer-review

162 Citations (Scopus)


The friction and wear of self-mated SiC and Si3N4 with different initial roughness sliding in water were investigated with pin-on-disk apparatus at normal load of 5 N and sliding speed of 120 mm/s in ambient condition. It was found that, for self-mated Si3N4, the wear mechanism for surface smoothening to obtain low friction was tribochemical wear, but for self-mated SiC, it changed from mechanical wear into tribochemical wear with increasing sliding cycles. After running-in in water, self-mated Si3N4 exhibited lower steady-state friction coefficient than self-mated SiC did. For these two ceramics, initial and steady-state friction coefficients were hardly dependent on initial roughness. Initial roughness mainly affected the running-in period. The larger the initial roughness, the longer the running-in period, but the running-in period was much shorter for self-mated Si3N4 at each initial roughness than that for self-mated SiC.

Original languageEnglish
Pages (from-to)246-255
Number of pages10
Issue number1-12
Publication statusPublished - 2001 Oct


  • Friction
  • Initial roughness
  • Mechanical wear
  • Running-in period
  • SiC
  • SiN
  • Tribochemical wear

ASJC Scopus subject areas

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


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