Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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Comparative Study to the Tribological Characteristics of Graphite Nano Lubricants after Thermal Degradation

그라파이트 나노윤활유의 열화 후 윤활 특성 비교 연구

  • Lee, Jae-Keun (School of Mechanical Engineering, Pusan National University) ;
  • Lee, Chang-Gun (School of Mechanical Engineering, Pusan National University) ;
  • Hwang, Yu-Jin (School of Mechanical Engineering, Pusan National University) ;
  • Choi, Young-Min (School of Mechanical Engineering, Pusan National University) ;
  • Park, Min-Chan (School of Mechanical Engineering, Pusan National University) ;
  • Choi, Cheol (Advanced Materials Research Group, Korea Electric Power Research Institute) ;
  • Oh, Je-Myung (Advanced Materials Research Group, Korea Electric Power Research Institute)
  • 이재근 (부산대학교 기계공학부) ;
  • 이창건 (부산대학교 기계공학부) ;
  • 황유진 (부산대학교 기계공학부) ;
  • 최영민 (부산대학교 기계공학부) ;
  • 박민찬 (부산대학교 기계공학부) ;
  • 최철 (한전전력연구원 전력소재그룹) ;
  • 오제명 (한전전력연구원 전력소재그룹)
  • Published : 2008.08.31
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Abstract

Many researchers have tried to improve the tribological characteristics of lubricant by adding various nano particles in the base lubricant. But the reliability evaluation of the lubricants are rarely performed in its real operation condition. In this study, the physical property and the tribological characteristics of the graphite nano lubricant were evaluated and compared with raw lubricant after thermal degrading. In order to evaluate the tirbological characteristics, the disk-on-disk tribotester was adopted to measure the friction coefficient of the graphite nano lubricants. Also the temperature variations of friction surfaces were measured by the thermocouple installed on the fixed plate in the test chamber of the tribotester. The kinematic viscosity was measured using a capillary viscometer on the temperatures of 40, 60 and $80^{\circ}C$. The results showed that the graphite nano lubricant had lower friction coefficient and less wear on the friction surfaces than raw lubricant. After thermally degrading, the friction coefficients of graphite nano lubricant increased, but the friction coefficients after thermal degradation were still maintained lower than those of raw lubricant.

Keywords

References

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