Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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Tribological Properties of Nanoporous Structured Alumina Film

나노기공구조를 가진 알루미나필름의 트라이볼로지 특성

  • Kim, Hyo-Sang (Graduate school of Nano IT Fusion Technology, Seoul National University of Technology) ;
  • Kim, Dae-Hyun (Graduate school of Nano IT Fusion Technology, Seoul National University of Technology) ;
  • Ahn, Hyo-Sok (Graduate school of Nano IT Fusion Technology, Seoul National University of Technology) ;
  • Hahn, Jun-Hee (Korea Research Institute of Standards and Science) ;
  • Woo, Lee (Korea Research Institute of Standards and Science)
  • 김효상 (서울산업대학교 NID융합기술대학원) ;
  • 김대현 (서울산업대학교 NID융합기술대학원) ;
  • 안효석 (서울산업대학교 NID융합기술대학원) ;
  • 한준희 (한국표준과학연구원) ;
  • 이우 (한국표준과학연구원)
  • Received : 2009.11.01
  • Accepted : 2009.12.21
  • Published : 2010.02.28
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Abstract

Tribological properties of nanoporous structured alumina film was investigated. Alumina film (AAO: anodic aluminum oxide) of $60{\mu}m$ thickness having nanopores of 45 nm diameter with 105 nm interpore-diatance was fabricated by mild anodization process. Reciprocating ball-on-flat sliding friction tests using 1 mm diameter steel ball as a counterpart were carried out with wide range of normal load from 1 mN to 1 N in an ambient environment. The morphology of worn surfaces were analyzed using scanning electron microscopy. The friction coefficient was strongly influenced by the applied normal load. Smooth layer patches were formed on the worn surface of both AAO and steel ball at relatively high load (100 mN and 1 N) due to tribochemical reaction and compaction of wear debris. These tribolayers contributed to the lower friction at high loads. Extremely thin layer patches, due to mild plastic deformation of surface layer, were sparsely distributed on the worn surface of AAO at low loads (1 mN and 10 mN) without the evidence of tribochemical reaction. Delaminated wear particles were generated at high loads by fatigue due to repeated loading and sliding.

Keywords

References

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