Film Thickness and Friction Relationship in Grease Lubricated Rough Contacts

• Type: Article in International Scientific Journal
• Date: 2017

Authors

Goncalves, D (Author) Other; Vieira, A (Author) Other; Carneiro, A (Author) Other; Campos, AV (Author) Other; Jorge Seabra (Author) FEUP

Journal

Title: Lubricants

Vol. 5

Final page: 34

Publisher: MDPI

Indexing

ISI Web of Knowledge - 6 Citations

Scopus - 20 Citations

Other information

Authenticus ID: P-00N-0DT

DOI: 10.3390/lubricants5030034

Abstract (EN): The relationship between the film generation and the coefficient of friction in grease lubricated contacts was investigated. Ball-on-disc tests were performed under different operating conditions: entrainment speed, lubricant temperature and surface roughness. The tests were performed with fully formulated greases and their base oils. The greases were formulated with different thickener types and also different base oils natures and viscosities. Film thickness measurements were performed in ball-on-glass disc tests, and Stribeck curves were measured in ball-on-steel disc tests with discs of different roughness. The role of the thickener and the base oil nature/viscosity on the film thickness and coefficient of friction was addressed and the greases' performance was compared based on their formulation.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 16