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Effect of Hygrothermal Ageing on Tribological Behaviour of PTFE-Based Composites
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0002-8285-9841
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0001-8676-8819
2018 (English)In: Lubricants, E-ISSN 2075-4442, Vol. 6, no 4, article id 103Article in journal (Refereed) Published
Abstract [en]

The present study investigates the influence of hygrothermal ageing on the tribological behaviour of polytetrafluoroethylene (PTFE) polymer composites. Three PTFE composites along with unfilled PTFE were tested in sliding contact against Inconel 625 (a Ni-based alloy) plates in both dry and water-lubricated conditions, utilising a unidirectional pin-on-disc tribometer. The tribo-tests were performed at a constant sliding speed of 0.13 m/s with a normal load of 84N providing an apparent contact pressure of 5 MPa. Hygrothermal conditioning was carried out at two different temperatures, and the water absorption evolution and kinetic parameters were estimated. Various characterisation methods were used to identify the wear mechanisms and influence of hygrothermal ageing on the degradation of the filler/matrix. The different tribological behaviour for different PTFE composites was observed within the ageing timeframe. The wear resistance of the fibre-filled samples was reduced compared to the non-aged ones over the ageing timeframe. However, the friction and wear resistance of the bronze-filled PTFE were enhanced by hygrothermal ageing.

Place, publisher, year, edition, pages
MDPI, 2018. Vol. 6, no 4, article id 103
Keywords [en]
hygrothermal ageing, PTFE, friction, wear
National Category
Mechanical Engineering Materials Engineering Composite Science and Engineering Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Research subject
Machine Elements
Identifiers
URN: urn:nbn:se:ltu:diva-71930DOI: 10.3390/lubricants6040103ISI: 000455618500019Scopus ID: 2-s2.0-85059383793OAI: oai:DiVA.org:ltu-71930DiVA, id: diva2:1268601
Note

Validerad;2019;Nivå 2;2019-02-01 (inah)

Available from: 2018-12-06 Created: 2018-12-06 Last updated: 2019-02-01Bibliographically approved

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Golchin, ArashEmami, Nazanin

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Homayoun, Mohammad-RezaGolchin, ArashEmami, Nazanin
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Machine Elements
Mechanical EngineeringMaterials EngineeringComposite Science and EngineeringTribology (Interacting Surfaces including Friction, Lubrication and Wear)

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