The difference in running-in period and friction coefficient between self-mated Si3N4 and SiC under water lubrication

Ming Chen, Koji Kato, Koshi Adachi

Research output: Contribution to journalArticlepeer-review

71 Citations (Scopus)


Running-in periods and friction coefficients of SiC and Si3N4 sliding against themselves under water lubrication were investigated with a pin-on-disk apparatus at sliding speed of 120 mm/s and a normal load of 5 N under ambient conditions. It was found that the running-in period of self-mated Si3N4 is much shorter than that of self-mated SiC, and also that the steady-state friction coefficient of self-mated Si3N4 was lower (≤0.0035) than that of self-mated SiC (0.01). The difference in mechanism was analyzed from the point of view of electronic structure and surface chemistry.

Original languageEnglish
Article number340506
Pages (from-to)23-28
Number of pages6
JournalTribology Letters
Issue number1
Publication statusPublished - 2001


  • Friction coefficient
  • Running-in period
  • Silicon carbide
  • Silicon nitride
  • Tribochemical reaction
  • Water lubrication

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films


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