The Structure and Tribological Properties of Ni/MoS2 Composite Layers Formed on Aluminum and Its Alloys

Beata Kucharska , Jarosław Mizera , Magdalena Szumiata , Andrzej Zagórski , Jerzy Robert Sobiecki

Abstract

This work investigates the influence of process parameters on microstructure, adhesion of layers to the substrate and wear resistance of Ni/MoS 2 micro- and nanocrystalline composite layers. Pure nickel coatings were also fabricated and tested for comparison. The layers were deposited by electrochemical reduction on pure A2 aluminum and on PA6 alloy. The layers were produced at a current density of 3 A/dm 2 and a mixing speed of 400 rpm. The bath composition was also modified by the addition of saccharin and the disperse phase of molybdenum disulfide in the bath (2.5 and 5 g/l). Materials prepared in this way underwent structural investigations (using scanning electron microscopy and optical microscopy), a scratch test and tribological tests (using a ball-on-disc method). The results of the tests allowed to determine the dependence of the structure and properties of the produced coatings on the production parameters. The composition of the electrolyte affects the size of crystallites as well as the morphology and topography of the surface. The scratch test confirmed the good adhesion of the nickel and composite layers to the substrate. The best lubricating properties were shown by nanocrystalline coatings. The too high content of molybdenum disulfide in the bath caused an undesirable increase in the coefficient of friction
Author Beata Kucharska (FMSE / DSE)
Beata Kucharska,,
- Division of Surface Engineering
, Jarosław Mizera (FMSE / DMD)
Jarosław Mizera,,
- Division of Materials Design
, Magdalena Szumiata (FMSE / DMD)
Magdalena Szumiata,,
- Division of Materials Design
, Andrzej Zagórski (FMSE / DMD)
Andrzej Zagórski,,
- Division of Materials Design
, Jerzy Robert Sobiecki (FMSE / DSE)
Jerzy Robert Sobiecki,,
- Division of Surface Engineering
Pages139-147
Publication size in sheets0.5
Book Pogrebnjak Alexander D., Novosad Valentine (eds.): Advances in Thin Films, Nanostructured Materials, and Coatings, Lecture Notes in Mechanical Engineering, 2019, Springer Singapore, ISBN 978-981-13-6132-6, [978-981-13-6133-3], DOI:10.1007/978-981-13-6133-3
Keywords in PolishAluminium, metody elektrochemiczne, dwusiarczek molibdenu, warstwy kompozytowe, trybologia
Keywords in EnglishAluminum; An electrochemical method; Molybdenum disulfide; Ni-MoS 2 composite layers; Tribology
DOIDOI:10.1007/978-981-13-6133-3_14
URL https://www.scopus.com/inward/record.uri?eid=2-s2.0-85062455605&doi=10.1007%2f978-981-13-6133-3_14&partnerID=40&md5=43acc8d39570cead7154a7556a4a5fad
Languageen angielski
File
Kucharska2019_Chapter_TheStructureAndTribologicalPro.pdf 832.62 KB
Score (nominal)5
ScoreMinisterial score = 5.0, 29-07-2019, MonographChapterAuthor
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