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The tribological behaviour of mineral oils additivated with polyethylene
Author(s) -
Bercea Maria,
Bercea Ioan,
Nelias Daniel,
Olaru Dumitru
Publication year - 1999
Publication title -
lubrication science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.632
H-Index - 36
eISSN - 1557-6833
pISSN - 0954-0075
DOI - 10.1002/ls.3010110304
Subject(s) - tribology , materials science , base oil , lubrication , mineral oil , polymer , polyethylene , rheology , composite material , bearing (navigation) , lubricant , base (topology) , metallurgy , scanning electron microscope , mathematical analysis , cartography , mathematics , geography
The paper investigates the elastohydrodynamic lubrication of concentrated contacts in a rolling bearing operating at moderate speeds. Two base oils with different characteristics, additivated with low‐density polyethylene were used as lubricants. Rheological and tribological tests were performed to study the influence of temperature, polymer concentration, and bearing speed. The influence of the addition of a polymer component on the film‐forming properties and on wear under high pressure was examined in a four‐ball test rig. Experimental data show that the polymer concentration added to the base oil plays an important role in obtaining greater film thicknesses and in preventing wear in elastohydrodynamic contacts.