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Tribological Influence of Kinematic Oil Viscosity Impregnated in Nanopores of Anodic Aluminum Oxide Film

함침 오일 점도에 따른 나노동공 구조의 산화알루미늄 박막의 마찰 및 마멸 거동

  • Kim, Dae-Hyun (Graduate School of NID Fusion Technology, Seoul Nat'l Univ. of Science and Technology) ;
  • Ahn, Hyo-Sok (MSDE Program, College of Business and Technology, Seoul Nat'l Univ. of Science and Technology)
  • 김대현 (서울과학기술대학교 NID융합기술대학원) ;
  • 안효석 (서울과학기술대학교 기술경영융합대학 MSDE 프로그램)
  • Received : 2012.10.24
  • Accepted : 2013.02.18
  • Published : 2013.05.01

Abstract

The friction behavior of a 60-${\mu}m$-thick anodic aluminum oxide (AAO) film having cylindrical nanopores of 45-nm diameter was investigated as a function of impregnated oil viscosity ranging from 3.4 to 392.6 cSt. Reciprocating ball-on-flat sliding friction tests using a 1-mm-diameter steel ball as the counterpart were carried out with normal load ranging from 0.1 to 1 N in an ambient environment. The friction coefficient significantly decreased with an increase in the oil viscosity. The boundary lubrication film remained effectively under all test conditions when high-viscosity oil was impregnated, whereas it was easily destroyed when low-viscosity oil was impregnated. Thin plastic deformed layer patches were formed on the worn surface with high-viscosity oil without evidence of tribochemical reaction and transfer of counterpart material.

Keywords

Impregnated Oil;Kinematic Viscosity;Nanopores;Boundary Lubrication;Anodic Aluminum Oxide Film;Friction and Wear

Acknowledgement

Supported by : 서울과학기술대학교

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