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The aim of this paper is to confirm the role of the electric charges on the friction behaviour of non-conductive materials. This correlation is proven using tribo-tests and SEMME (Scanning Electron Microscope Mirror Effect) measurements carried out on the neat epoxy matrix and on two GFRE composites, which only differ by the sizing of the fibres.For the matrix, the influence of friction is only obvious...
The sliding friction and wear behaviour of 15Cr–15Ni–2Mo titanium-modified austenitic stainless steel (alloy D9) was studied in high purity liquid sodium at high temperature viz. 473 and 823K respectively using a reciprocating-type tribometer. Weight loss measured in specimens after the tests was negligible. Scar depth measurements on disc specimens were carried out by confocal laser scanning microscope,...
The non-lubricated, ball-on-flat sliding friction and wear properties of in situ (TiB 2 +TiC)/Ti 3 SiC 2 composites against bearing steel ball were investigated. The load was varied from 10 to 30N. The material without TiB 2 shows an increasing friction coefficient with the increasing load. However, for (TiB 2 +TiC)/Ti 3 SiC 2 composites, the...
Pin-on-disc tests to investigate the tribological behavior of AlCoCrFeNiCu high-entropy alloy under lubrication conditions with 90% hydrogen peroxide solution and lubricant oil, respectively, were performed. The study demonstrates that the AlCoCrFeNiCu high-entropy alloy lubricated correspondingly with lubricant of 90% hydrogen peroxide solution (hereafter termed hydrogen peroxide lubricant) and lubricant...
The work here described aimed to assess the tribological behaviour of a Ni-matrix-nanocomposite film and to gain understanding of the role that the reinforcing phases play in it. The composite consisted of an array of Ag-coated SnO2 nanowires grown onto a substrate, around which the Ni matrix was galvanostatically deposited. Friction and wear were evaluated under dry sliding conditions using a linearly...
Rolling elements made of 52100 steel were subjected to high austenitizing temperatures to embrittle the steel. The embrittled rolling elements were intentionally given a rougher surface finish and were subjected to bearing tests under rolling-sliding conditions. Post-test material investigations revealed cracks in the raceways and rollers. Detailed electron microscopy investigations showed highly...
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