Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference (한국윤활학회:학술대회논문집)

Korean Tribology Society (한국트라이볼로지학회)
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EFFECT OF SURFACE ROUGHNESS OF MATING SURFACE AND TRANSFER LAYER ON FRICTION BETWEEN a-CNx AND $Si_3N_4$ IN NITROGEN

  • Umehara, N. (Department of Mechanical Engineering, Nagoya Institute of Technology) ;
  • Tokoroyama, T. (Graduate School of Mechanical Engineering, Tokyo Metropolitan Institute of Technology) ;
  • Tomita, H. (Technical Center, OILES Co. Ltd.) ;
  • Takenoshita, Y. (Technical Center, OILES Co. Ltd.)
  • Published : 2002.10.21
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Abstract

During the sliding between a-CNx and $Si_3N_4$, applying nitrogen as environmental gas provided very low friction as the level of 0.01 in friction coefficient. In order to know the effect of the running-in process on the reduction of the friction, the effect of surface roughness of mating surface on friction was investigated. It was shown that smooth surface in wear scar of ball provided low friction coefficient. Friction coefficient after running-in was proportional to the Ry value of wear scar of ball. Also smooth thin transferred layer was observed on the wear scar of balls with an AFM after sliding test. Those results showed the smoothing of wear scar of ball, the generating of the transferred layer from CNx was necessary for low friction.

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