Detail publikačního výsledku

The influence of surface modification on friction and lubrication mechanism under a bovine serum lubricated condition

CHOUDHURY, D.; GHOSH, S.; ALI, F.; VRBKA, M.; HARTL, M.; KŘUPKA, I.

Original Title

The influence of surface modification on friction and lubrication mechanism under a bovine serum lubricated condition

English Title

The influence of surface modification on friction and lubrication mechanism under a bovine serum lubricated condition

Type

WoS Article

Original Abstract

Diamond like carbon (DLC) and micro dimple are two potential surface modification techniques that are extensively studied to be utilized into biotribological interfaces in order to reduce friction coefficient and wear rate. However, in situ observation of bovine serum lubricated DLC and micro dimpled surface contact are not well understood yet. In this study, a DLC coated and a micro dimpled steel ball rubbed against the Cr coated glass disk, where 25% bovine serum was used as a lubricant, and the temperature was maintained at 37° C. The behaviors of interface were captured using an optical interferometry and the friction coefficients were measured using a torque sensor simultaneously. The experimental results reveal that DLC/glass sliding is scuffling-free, having lowered friction coefficient, however the lubrication film formation is insignificant. On the other hand, the dimples retained lubrication and as a result, the wear of the glass disk were minimized, however friction coefficient were not reduced. Therefore, the DLC and micro dimpled individually have few improved tribological features, but their combination should be considered for maximizing the performances.

English abstract

Diamond like carbon (DLC) and micro dimple are two potential surface modification techniques that are extensively studied to be utilized into biotribological interfaces in order to reduce friction coefficient and wear rate. However, in situ observation of bovine serum lubricated DLC and micro dimpled surface contact are not well understood yet. In this study, a DLC coated and a micro dimpled steel ball rubbed against the Cr coated glass disk, where 25% bovine serum was used as a lubricant, and the temperature was maintained at 37° C. The behaviors of interface were captured using an optical interferometry and the friction coefficients were measured using a torque sensor simultaneously. The experimental results reveal that DLC/glass sliding is scuffling-free, having lowered friction coefficient, however the lubrication film formation is insignificant. On the other hand, the dimples retained lubrication and as a result, the wear of the glass disk were minimized, however friction coefficient were not reduced. Therefore, the DLC and micro dimpled individually have few improved tribological features, but their combination should be considered for maximizing the performances.

Keywords

Diamond like carbon; micro dimple; bovine serum; friction coefficient; film formation

Key words in English

Diamond like carbon; micro dimple; bovine serum; friction coefficient; film formation

Authors

CHOUDHURY, D.; GHOSH, S.; ALI, F.; VRBKA, M.; HARTL, M.; KŘUPKA, I.

RIV year

2017

Released

08.04.2016

Publisher

Taylor & Francis

Location

United Kingdom

ISBN

1040-2004

Periodical

TRIBOLOGY TRANSACTIONS

Volume

59

Number

2

State

United States of America

Pages from

316

Pages to

322

Pages count

7

URL

http://www.tandfonline.com/doi/abs/10.1080/10402004.2015.1077409#.VfAuKun_Whc

Full text in the Digital Library

http://hdl.handle.net/

BibTex

@article{BUT116116,
  author="CHOUDHURY, D. and GHOSH, S. and ALI, F. and VRBKA, M. and HARTL, M. and KŘUPKA, I.",
  title="The influence of surface modification on friction and lubrication mechanism under a bovine serum lubricated condition",
  journal="TRIBOLOGY TRANSACTIONS",
  year="2016",
  volume="59",
  number="2",
  pages="316--322",
  doi="10.1080/10402004.2015.1077409",
  issn="1040-2004",
  url="http://www.tandfonline.com/doi/abs/10.1080/10402004.2015.1077409#.VfAuKun_Whc"
}