Publication detail

The influence of Thin Boundary Films on Real Surface Roughness in Thin Film, Mixed EHD Contact

KŘUPKA, I. HARTL, M.

Czech title

Vliv tenkých mezných filmů na povrchové nerovnosti mazaných kontaktů

English title

The influence of Thin Boundary Films on Real Surface Roughness in Thin Film, Mixed EHD Contact

Type

journal article - other

Language

en

Original abstract

The behaviour of thin viscous boundary films in the rough surface rolling-sliding point contact operated under thin film lubrication conditions have been observed by thin film colorimetric interferometry. Changes in film thickness distribution within the lubricated contact between steel ball and glass disc were studies with both mineral base oil and mineral oil formulated with non-functionalized polyalkylmethacrylate (PAMA). Recent studies by other researchers showed that this polymer containing viscosity index improver exhibits some friction-reducing capabilities even though it forms only very thin boundary films on rubbing surfaces. Results obtained in the current study proved that thin viscous boundary films formed on rubbing surfaces can reduce asperities interactions of rubbing surfaces under very thin film conditions. Even though these boundary films do not separate rubbing surfaces completely they still can provide some protection of contacting bodies against excessive friction and wear.

Czech abstract

Článek přináší původní výsledky výzkumu vlivu tenkých mezných filmů na chování mazaných kontaktů provozovaných za podmínek smíšeného mazání.

English abstract

The behaviour of thin viscous boundary films in the rough surface rolling-sliding point contact operated under thin film lubrication conditions have been observed by thin film colorimetric interferometry. Changes in film thickness distribution within the lubricated contact between steel ball and glass disc were studies with both mineral base oil and mineral oil formulated with non-functionalized polyalkylmethacrylate (PAMA). Recent studies by other researchers showed that this polymer containing viscosity index improver exhibits some friction-reducing capabilities even though it forms only very thin boundary films on rubbing surfaces. Results obtained in the current study proved that thin viscous boundary films formed on rubbing surfaces can reduce asperities interactions of rubbing surfaces under very thin film conditions. Even though these boundary films do not separate rubbing surfaces completely they still can provide some protection of contacting bodies against excessive friction and wear.

Keywords in Czech

Smíšené mazání; tloušťka mazacího filmu; mezné filmy

Keywords in English

Mixed lubrication; Boundary films; Thickness; Polyalkylmethacrylate

RIV year

2007

Released

01.10.2007

Publisher

Elsevier

Location

Velká Británie

ISSN

0301-679X

Journal

Tribology International

Volume

40

Number

11

Pages from–to

1553–1560

Pages count

8

BIBTEX


@article{BUT43777,
  author="Ivan {Křupka} and Martin {Hartl},
  title="The influence of Thin Boundary Films on Real Surface Roughness in Thin Film, Mixed EHD Contact",
  journal="Tribology International",
  year="2007",
  volume="40",
  number="11",
  month="October",
  pages="1553--1560",
  publisher="Elsevier",
  address="Velká Británie",
  issn="0301-679X"
}