Tribology of fluorinated diamond-like carbon coatings: First principles calculations and sliding experiments

F. G. Sen, Y. Qi, A. T. Alpas

Research output: Research - peer-reviewArticle

  • 9 Citations

Abstract

Sliding contact experiments and first principles calculations were conducted to study tribological properties of aluminium and fluorinated diamond-like carbon (F-DLC) surfaces. Sliding tests between Al and an F-DLC coating generated a low coefficient of friction (COF) of 0.09-0.14 and led to the formation of carbonaceous transfer layers containing AlF3 on the Al surfaces as determined by X-ray photoelectron spectroscopy. An interface model that examined the interactions between Al (111) and F-terminated diamond (111) surfaces revealed that F atoms would transfer to the Al surface in increasing quantities with an increase in the contact pressure and the F transfer would lead to the formation of a stable AlF3 compound at the Al surface. The generation of repulsive forces between two F-passivated surfaces as a result of the F transfer to the Al surface was shown to be responsible for the low COF between Al and F-DLC.

LanguageEnglish (US)
Pages111-121
Number of pages11
JournalLubrication Science
Volume25
Issue number2
DOIs
StatePublished - Mar 2013
Externally publishedYes

Profile

Diamond
Tribology
Carbon
Coatings
Experiments
Diamonds
Friction
Aluminum
X ray photoelectron spectroscopy
Atoms

Keywords

  • adhesion
  • aluminium
  • diamond-like carbon
  • first principles simulations
  • fluorine
  • interface

ASJC Scopus subject areas

  • Materials Chemistry
  • Surfaces, Coatings and Films

Cite this

Tribology of fluorinated diamond-like carbon coatings : First principles calculations and sliding experiments. / Sen, F. G.; Qi, Y.; Alpas, A. T.

In: Lubrication Science, Vol. 25, No. 2, 03.2013, p. 111-121.

Research output: Research - peer-reviewArticle

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