Detail publikace
Chování viskózních mezných filmů v mazaných kontaktech mezi třecími povrchy s cílenou modifikací topografie
KŘUPKA, I. HARTL, M. POLIŠČUK, R.
Český název
Chování viskózních mezných filmů v mazaných kontaktech mezi třecími povrchy s cílenou modifikací topografie
Anglický název
Behavior of thin viscous boundary films in lubricated contacts between micro-textured surfaces
Typ
článek v časopise - ostatní, Jost
Jazyk
en
Originální abstrakt
Thin film colorimetric interferometry was used to map changes in film thickness in the vicinity of micro-dents of various depths produced on rubbing surfaces. It has been shown in recent studies that shallow micro-features within concentrated contact can increase mean film thickness by supplying more lubricant to the contact; however, this beneficial effect can also be accompanied by a local film thickness reduction. Nevertheless, these observations were done with mineral base oils that exhibited no boundary films formation. In this study the behavior of micro-textured surfaces are observed using formulated lubricant containing polyalcylmethacrylate (PAMA), viscosity index improver with boundary film forming properties. Obtained results show that an enlarged film thickness due to the presence of viscous boundary films is formed within the whole contact and these boundary films minimize the local film thickness reduction caused by micro-dents and further increase the efficiency of surface texturing within non-conformal contacts. It can be suggested from the obtained results that joint action of both boundary film formation and surface texturing combines both contributions that can help to increase tribological performances in different stages of machine parts operation by increasing lubrication film thickness.
Český abstrakt
Článek shrnuje výsledky studia chování viskózních mezných filmů v mazaných kontaktech mezi třecími povrchy s cílenou modifikací topografie.
Anglický abstrakt
Thin film colorimetric interferometry was used to map changes in film thickness in the vicinity of micro-dents of various depths produced on rubbing surfaces. It has been shown in recent studies that shallow micro-features within concentrated contact can increase mean film thickness by supplying more lubricant to the contact; however, this beneficial effect can also be accompanied by a local film thickness reduction. Nevertheless, these observations were done with mineral base oils that exhibited no boundary films formation. In this study the behavior of micro-textured surfaces are observed using formulated lubricant containing polyalcylmethacrylate (PAMA), viscosity index improver with boundary film forming properties. Obtained results show that an enlarged film thickness due to the presence of viscous boundary films is formed within the whole contact and these boundary films minimize the local film thickness reduction caused by micro-dents and further increase the efficiency of surface texturing within non-conformal contacts. It can be suggested from the obtained results that joint action of both boundary film formation and surface texturing combines both contributions that can help to increase tribological performances in different stages of machine parts operation by increasing lubrication film thickness.
Klíčová slova česky
tenké mazací filmy; tloušťka; cílená modifikace topografie; mezné filmy
Klíčová slova anglicky
Thin film lubrication; Film thickness; Surface texturing; Boundary films
Rok RIV
2008
Vydáno
12.05.2008
Nakladatel
Elsevier
Místo
NL
ISSN
0301-679X
Časopis
Tribology International
Ročník
42
Číslo
X
Strany od–do
1–7
Počet stran
7
BIBTEX
@article{BUT47111,
author="Ivan {Křupka} and Martin {Hartl} and Radek {Poliščuk},
title="Behavior of thin viscous boundary films in lubricated contacts between micro-textured surfaces",
journal="Tribology International",
year="2008",
volume="42",
number="X",
month="May",
pages="1--7",
publisher="Elsevier",
address="NL",
issn="0301-679X"
}