Tribology and Lubricants

  • 제27권6호
  • /
  • Pages.293-301
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  • 2011
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  • 2713-8011(pISSN)
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  • 2713-802X(eISSN)
한국트라이볼로지학회 (Korean Tribology Society)
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상대재료의 표면거칠기에 따른 PTFE와 UHMWPE의 마찰 및 마멸 특성

Effect of Surface Roughness of Counterface on Tribological Characteristics of PTFE and UHMWPE

  • Dong, Sun (School of Mechanical Engineering, University of Ulsan) ;
  • Chung, Koo-Hyun (School of Mechanical Engineering, University of Ulsan) ;
  • Lee, Kyung-Sick (School of Mechanical Engineering, University of Ulsan)
  • 투고 : 2011.07.19
  • 심사 : 2011.09.23
  • 발행 : 2011.12.31
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초록

Understanding of the tribological characteristics of polytetrafluoroethylen (PTFE) and ultra-high-molecular-weight polyethylene (UHMWPE) is crucial for their applications such as bearing and total joint replacement. In this work, the effect of the surface roughness of carbon steel on the tribological behaviors of PTFE and UHMWPE was experimentally investigated by using block-on-ring tribotester with friction force monitoring capability. It was found that that the amount of material transfer layers of PTFE formed on the carbon steel was significantly larger than those of UHMWPE, which was responsible the lower friction coefficient of PTFE. It was also concluded that the effect of surface roughness of carbon steel on the friction coefficient of UHMWPE was more significant than that of PTFE. For UHMWPE, it was found that the effect of surface roughness of counterface was varied with respect to applied normal force and sliding as well. Based on Archard's wear law, the wear coefficient of PTFE and UHMWPE was calculated to be $3{\times}10^{-5}$ ~ $8{\times}10^{-5}$ and $7{\times}10^{-6}$ ~ $2{\times}10^{-5}$, respectively.

키워드

참고문헌

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