Analysis of self-lubrication enhancement via PA66 strategies: Texturing and nano-reinforcement with ZrO2 and graphene. (March 2019)

• Record Type: Journal Article
• Authors: Clavería, Isabel; Elduque, Daniel; Lostalé, Aleida; Fernández, Ángel; Castell, Pere; Javierre, Carlos
• Is Part Of: Tribology international. Volume 131(2019)
• Page Start: 332
• Page End: 342
• Publication Date: 2019-03
• Subjects: ZrO2 -- Graphene -- Friction -- Texturing; Tribology -- Periodicals; 621.89
• DOI: 10.1016/j.triboint.2018.10.044
• Languages: English
• ISSNs: 0301-679X

Abstract

Abstract: Graphene nanoflakes and zirconium dioxide (ZrO2 ) were added to polyamide 66-based composites with glass fibre in order to improve their self-lubricating properties and make them suitable for high-performance bearing applications. The influence of texturing the surfaces was also investigated. The tribological behaviour was analysed for different combinations of hybrid polymeric composites, percentages of additive, and texturing geometries. The results show that the lowest low friction coefficients are obtained for PA66 + 30GF with 5% graphene. Worn surfaces, analysed by scanning electron microscopy and optical microscopy confirm the enhancement of the tribological properties with the addition of graphene. Texturing results under dry lubrication are not relevant for tribological purposes. Highlights: Hybrid nanocomposites based on PA66 + GF and graphene or ZrO2 have been investigated. 5% Graphene hybrid composite exhibits the best tribological behavior. Addition of ZrO2 to the composite does not enhance its tribological behaviour. Microtexturing does not contribute to improve wear results.