Wyniki wyszukiwania - BazTech

1

Evaluation of the Effects of ZDDP and Graphene Additives in PAO 8 Oil on the Tribological Properties of Tialn Coating

Kowalczyk Joanna, Madej Monika, Ozimina Dariusz

Tribologia

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2023

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nr 2

35--44

EN

This paper investigates the tribological effects of graphene and anti-wear zinc dialkyl dithiophosphates (ZDDP). Friction tests have been carried out on a tribological tester which operates as a ball and disc assembly in a frictional, sliding motion. Tests were carried out with a load of 10 N over a sliding distance of 1000 m. TiAlN coated HS6-5-2C steel discs, and 100Cr6 steel balls were used in the tests. Tests were conducted under lubrication conditions with poly(α)olefin oil PAO 8 with graphene and/or ZDDP. The chemical composition of the TiAlN coating was studied using a scanning electron microscope, and the wear marks on the discs and balls were observed. The geometric structure of the samples was analysed before and after the friction tests using a confocal microscope with interferometric mode. The results indicated that the addition of ZDDP and graphene to the poly(α)olefin oil had an effect on reducing the friction coefficient.

PL

W artykule określono wpływ grafenu i dodatku przeciwzużyciowego dialkiloditiofosforanu cynku ZDDP na właściwości tribologiczne. Badania tarciowe przeprowadzono na testerze tribologicznym pracującym w skojarzeniu trącym kula–tarcza w ruchu ślizgowym. Testy wykonano przy obciążeniu 10 N na drodze tarcia równej 1000 m. Do badań użyto tarcz ze stali HS6-5-2C z powłoką TiAlN oraz kul ze stali 100Cr6. Testy przeprowadzono w warunkach smarowania olejem poli(α)olefinowym PAO 8 z grafenem i/lub z ZDDP. Za pomocą mikroskopu skaningowego zbadano skład chemiczny powłoki TiAlN, a także obserwowano ślady wytarcia na tarczach i kulach. Przy użyciu mikroskopu konfokalnego z trybem interferometrycznym dokonano analizy struktury geometrycznej próbek przed oraz po testach tarciowych. Uzyskane wyniki badań wskazały, że dodatek ZDDP i grafenu do oleju poli(α)olefinowego wpłynął na zmniejszenie współczynnika tarcia.

2

The Impact of Biodegradable Cutting Fluid on the Tribological Properties of the Friction Pairs

Ozimina D., Kowalczyk J., Madej M.

Tribologia

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2016

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nr 1

67--78

PL

W artykule przedstawiono wyniki badań tribologicznych na testerze T-01 M pracującym w skojarzeniu trącym kula-tarcza w ruchu ślizgowym. Testy zrealizowano dla tarcz ze stali HS6-5-2C bez powłoki i z powłoką TiAlN naniesioną techniką fizycznego osadzania z fazy gazowej PVD oraz kul ze stali 100Cr6. Badania wykonano w warunkach tarcia technicznie suchego i ze smarowaniem cieczą chłodząco-smarującą zawierającą dodatek uszlachetniający – asparginian cynku. Obserwacje struktury powłoki zrealizowano przy użyciu mikroskopu skaningowego SEM JSM - 7100F. Analizę struktury geometrycznej powierzchni tarcz oraz kul przed i po testach tribologicznych wykonano profilometrem optycznym Talysurf CCI Lite. Użyta do badań ciecz obróbkowa wpłynęła na zmniejszenie oporów ruchu oraz dodatkowo zapewniła ochronę antykorozyjną w czasie prowadzenia testów.

EN

This paper discusses the results of wear tests performed with a T-01 M tribometer for a ball-on-disc configuration in sliding contact. The tests were carried out for HS6-5-2C steel discs with and without a TiAlN coating deposited by physical vapour deposition (PVD), which were in contact with 100Cr6 steel balls. The tests were conducted under dry friction conditions and under lubricated friction conditions with a cutting fluid containing zinc aspartate. The coating structure was observed using a JSM - 7100F Canning electron microscope. The surface texture of the discs and the balls was analysed before and after the tribological tests with a Talysurf CCI Lite optical measurement system. The cutting fluid used in the tests contributed to a reduction in the friction resistance and offered anti-corrosion protection.

3

Nanoindentation measurements of PVD coated multilayer constructions

Schulze M., Seidlitz H., König F., Weiß S.

Journal of Achievements in Materials and Manufacturing Engineering

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2015

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Vol. 72, nr 2

53--60

EN

Purpose: Carbon fibre reinforced thermoplastics (CFRP) are intensively used in lightweight applications due to their high strength to weight ratio. In addition they offer good crash, damping and recycling properties. On the basis of their morphology they are suitable for large scale manufacturing processes. A major disadvantage consists of its poor hardness properties, which is again an important requirement to realize a good erosion and wear behaviour. Design/methodology/approach: In this work the application of orthotropic carbon fibre reinforced polymers (PA6), with protective TiAlN coatings, produced by physical vapor deposition (PVD), is investigated. The characterization of the coating is performed by nanoindentation tests, roughness measurements and scanning electron microscopy. Furthermore micro hardness tests on selected well prepared cross sections are conducted, to compare the coating quality with established coating systems. Findings: By applying TiAlN coating, the hardness of the CFRP samples can be increased substantially up to 15 GPa, in comparison to the basic substrate. In addition the quality of the coating surface can be improved significantly by plasma etching pre-treatment. Research limitations/implications: The presented findings are preliminary results to prove the application of a standard processed ceramic coating on new composite types for mass production. The PVD coating process as well as the utilized testing methods are suitable to realize hard coatings on thermoplastic CFRP. This effect can be exploited for several lightweight applications to increase the erosion and wear resistance of composite materials. Originality/value: The presented results show, that ceramic coatings can be deposited on standard thermoplastic CFRP with polyamide 6 matrix. Therewith it can be expected, that the PVD coating process can make a essential contribution to increase the range of applications.