Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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Friction Behavior of Oil-enriched Nanoporous Anodic Aluminum Oxide Film

오일 함침된 나노 기공 산화알루미늄 필름의 마찰 거동

  • Kim, Hyo-Sang (Graduate school of Nano IT Fusion Technology, Seoul National University of Science and Technology) ;
  • Kim, Dae-Hyun (Graduate school of Nano IT Fusion Technology, Seoul National University of Science and Technology) ;
  • Hahn, Jun-Hee (Korea Research Institute of Standards and Science, Division of materials measurement) ;
  • Ahn, Hyo-Sok (International fusion school, Seoul National University of Science and Technology)
  • 김효상 (서울과학기술대학교 NID융합기술대학원) ;
  • 김대현 (서울과학기술대학교 NID융합기술대학원) ;
  • 한준희 (한국표준과학연구원 재료측정센터) ;
  • 안효석 (서울과학기술대학교 국제융합학부)
  • Received : 2011.04.20
  • Accepted : 2011.06.20
  • Published : 2011.08.31
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Abstract

Friction behavior of nanoporous anodic aluminum oxide(AAO) film was investigated. A 60 ${\mu}m$ thick AAO film having nanopores of 45 nm diameter with 105 nm interpore-diatance was fabricated by mild anodization process. The AAO film was then saturated with paraffinic oil. Reciprocating ball-on-flat sliding friction tests using 1 mm diameter steel ball as the counterpart were carried out with normal load ranging from 0.1 N to 1 N in an ambient environment. The morphology of worn surfaces were analyzed using scanning electron microscopy. The friction coefficient significantly increased with the increase of load. The boundary lubrication layer of paraffinic oil contributed to the lower friction at relatively low load (0.1 N), but it is less effective at high load (1 N). Plastic deformed layer patches were formed on the worn surface of oil-enriched AAO at relatively low load (0.1 N) without evidence of tribochemical reaction. On the other hand, thick tribolayers were formed on the worn surface of both oil-enriched and as-prepared AAO at relatively high load (1 N) due to tribochemical reaction and material transfer.

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References

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