Film thickness and friction behaviour of thermally aged lubricating greases

• Type: Article in International Scientific Journal
• Date: 2016

Authors

Goncalves, D (Author) Other; Graca, B (Author) Other; Campos, AV (Author) Other; Jorge Seabra (Author) FEUP

Journal

Title: Tribology International

Vol. 100

Pages: 231-241

ISSN: 0301-679X

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 13 Citations

Scopus - 0 Citations

Other information

Authenticus ID: P-00K-NMK

DOI: 10.1016/j.triboint.2016.01.044

Abstract (EN): Non-additized batches of lubricating greases were subjected to an artificial thermal aging procedure. The fresh and aged samples were then tribologically characterized through film thickness measurements and Stribeck curves, over a large range of entrainment speeds on a ball-on-disc test rig at different operating temperatures, ensuring fully flooded conditions. The results were analysed at the light of the physical and chemical changes regarding the fresh greases. The film thickness increased for all greases after the thermal aging. The film thickness plateau at low speeds also changed and for certain greases it disappeared under the same range of entrainment speeds. The friction behaviour also changed considerably given the changes to the lubrication regimes for the same speeds.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 11