Surface oxide layers with an increased carbon content for applications in oil-less tribological systems

Abstract

The paper presents the properties of surface oxide layers with an increased content of carbon for tribological applications. The composite surface oxide layers were produced using a two-step technology through hard anodising of the surface of an aluminium alloy, followed by thermochemical treatment of anodic oxide coatings. The surface oxide layers were subjected to tribological tests in an oil-less sliding couple with T5W plastic. The presented test results confirm the usefulness of the proposed modifications of surface oxide layers for the purpose of enhancing the operational durability of oil-less sliding couples in a reciprocating motion.

Application of the Image Analysis Methods for the Study of Al2O3 Surafce Coatings

“…Obtained results may be interested for other researchers focused on coatings and surface layer modifications (Skoneczny and Bara, 2007;Bara et al, 2009;Kmita and Bara, 2012;Skoneczny et al, 2018;Bara et al, 2019), even in the combustion technology (Opydo et al, 2016). They may be also inspiring for related areas of materials science (Lipinski, 2015;Lipinski 2018;Szczotok et al, 2018), heavy-duty machines design and experimental design methodology (Pietraszek and Goroshko, 2014;Pietraszek et al, 2016), especially with the uncertainty quantification (Pietraszek et al, 2017) and fuzzy logic decision scheme Krawczyk and Sobczyk, 2018).…”

APPLICATION OF THE IMAGE ANALYSIS METHODS FOR THE STUDY OF Al2O3 SURAFCE COATINGS

“…Farther evaluation of computer image analysis connected with tribological estimation could be promising method used to characterize tribological properties of Al2O3/WS2 coatings even before tribological cooperation. Obtained results may be interested for other researchers focused on coatings and surface layer modifications (Skoneczny and Bara, 2007;Bara et al, 2009;Kmita and Bara, 2012;Skoneczny et al, 2018;Bara et al, 2019), even in the combustion technology (Opydo et al, 2016). They may be also inspiring for related areas of materials science (Lipinski, 2015;Lipinski 2018;Szczotok et al, 2018), heavy-duty machines design (Fabis-Domagala et al, 2018) and experimental design methodology (Pietraszek and Goroshko, 2014;Pietraszek et al, 2016), especially with the uncertainty quantification (Pietraszek et al, 2017) and fuzzy logic decision scheme (Filo et al, 2018;Krawczyk and Sobczyk, 2018).…”

Thermal Phenomena in the Friction Process of the TG15 - Hard Anodic Coating Couple

“…The produced anodic coatings are very hard when compared to the basic metal. Their microhardness measured with vickers method amounts to 500-600 μhv [3,8,9]. high resistance to abrasive wear plays a significant role in numerous applications of anodic coatings deposited on the working surfaces of sliding parts of machines.…”

“…Sliding contacts of polymers, understood as friction couples in which at least one component is made of a plastic material, are more and more frequently used in the machine building industry [2,3]. The most common plastic materials used for the production of sliding parts in machines are PTFE based composites with a graphite additive or polyurethane/polyacetal based composites containing PTFE as solid lubricant.…”

“…The most common plastic materials used for the production of sliding parts in machines are PTFE based composites with a graphite additive or polyurethane/polyacetal based composites containing PTFE as solid lubricant. Newer solutions propose polyurethane and polyetheretherketone based composite plastic materials reinforced with glass fibre and modified with solid lubricants [2], interacting with composite ceramic coatings modified with solid lubricants [3]. Composite materials containing carbon nanotubes or glassy carbon particles, which play the role of solid lubricants, offer new possibilities of shaping the tribological properties of oil free couples [4].…”