Functionality Investigations of Dry-Lubricated Molybdenum Trioxide Cylindrical Roller Thrust Bearings

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dc.identifier.uri Konopka, Dennis Pape, Florian Heimes, Norman Behrens, Bernd-Arno Möhwald, Kai Poll, Gerhard 2022-06-15T10:10:26Z 2022-06-15T10:10:26Z 2022
dc.identifier.citation Konopka, D.; Pape, F.; Heimes, N.; Behrens, B.-A.; Möhwald, K. et al.: Functionality Investigations of Dry-Lubricated Molybdenum Trioxide Cylindrical Roller Thrust Bearings. In: Coatings : open access journal 12 (2022), Nr. 5, 591. DOI:
dc.description.abstract In addition to using conventional lubricants, such as oil and grease, rolling bearings can also be used with a dry lubricant. For example, the use of dry lubricant systems is necessary when the application of oils or greases is not possible (e.g., at high temperatures or in aerospace applications). The requirements of a solid lubricant are to reduce friction and wear of mechanical contact partners. In this work, a molybdenum-based coating system was applied by means of physical vapor deposition (PVD). The coating system consists of a molybdenum (Mo) reservoir with molybdenum trioxide (MoO3) as the top layer. The MoO3, which is particularly important for the run-in and the lubricating effect, is intended to continuously regenerate from the reservoir via tribo-oxidation. To determine the friction and wear behavior, cylindrical roller thrust bearings were used. Experiments demonstrated that the lubrication system is effective and that the frictional behavior has been improved. On the one hand, the frictional torque of the rolling bearings has been considerably reduced and, on the other, significantly extended operating times have been determined compared to unlubricated reference experiments. Simultaneously, material analyses have been carried out by means of scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX). The investigations showed that the MoO3 was transferred to uncoated bearing components. This improved the tribological behavior and reduced abrasive and adhesive wear. eng
dc.language.iso eng
dc.publisher Basel : MDPI
dc.relation.ispartofseries Coatings : open access journal 12 (2022), Nr. 5
dc.rights CC BY 4.0 Unported
dc.subject rolling bearing eng
dc.subject dry lubricant eng
dc.subject Mo-coating eng
dc.subject PVD eng
dc.subject friction eng
dc.subject wear eng
dc.subject.ddc 660 | Technische Chemie ger
dc.title Functionality Investigations of Dry-Lubricated Molybdenum Trioxide Cylindrical Roller Thrust Bearings
dc.type Article
dc.type Text
dc.relation.essn 2079-6412
dc.bibliographicCitation.issue 5
dc.bibliographicCitation.volume 12
dc.bibliographicCitation.firstPage 591
dc.description.version publishedVersion
tib.accessRights frei zug�nglich

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