Characterization and Modeling of Nano Wear for Molybdenum-Based Lubrication Layer Systems

authored by: Bernd Arno Behrens, Gerhard Poll, Kai Möhwald, Simon Schöler, Florian Pape, Dennis Konopka, Kai Brunotte, Hendrik Wester, Sebastian Richter, Norman Heimes
Abstract: As a result of global economic and environmental change, the demand for innovative, environmentally-friendly technologies is increasing. Employing solid lubricants in rolling contacts can reduce the use of environmentally harmful greases and oils. The aim of the current research was the development of a solid lubricant system with regenerative properties. The layer system consisted of a molybdenum (Mo) reservoir and a top layer of molybdenum trioxide (MoO₃). After surface wear, Mo is supposed to react with atmospheric oxygen and form a new oxide. The determination of the wear volume of thin layers cannot be measured microscopically, which is why the wear behavior is initially determined on the nano level. In this work, single Mo and MoO₃ coatings prepared by physical vapor deposition (PVD) are characterized by nano testing. The main objective was to determine the wear volume of the single coatings using a newly developed method considering the initial topology. For this purpose, nano-wear tests with different wear paths and normal forces were carried out and measured by in situ scanning probe microscopy (SPM). Based on the characteristic values determined, the coefficient of wear was determined for wear modeling according to Sarkar. The validation of the wear model developed was carried out by further wear tests on the respective mono layers.
Organisation(s): Institute of Metal Forming and Metal Forming Machines
Institute of Machine Elements and Engineering Design
Institute of Materials Science
Type: Article
Journal: Nanomaterials
Volume: 11
ISSN: 2079-4991
Publication date: 21.05.2021
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Chemical Engineering(all), Materials Science(all)
Electronic version(s): https://doi.org/10.3390/nano11061363 (Access: Open)
: Details in the research portal "Research@Leibniz University"

BibTeX

@article{2ac684b207354c318d616f55876250d1,
title = "Characterization and Modeling of Nano Wear for Molybdenum-Based Lubrication Layer Systems",
abstract = "As a result of global economic and environmental change, the demand for innovative, environmentally-friendly technologies is increasing. Employing solid lubricants in rolling contacts can reduce the use of environmentally harmful greases and oils. The aim of the current research was the development of a solid lubricant system with regenerative properties. The layer system consisted of a molybdenum (Mo) reservoir and a top layer of molybdenum trioxide (MoO3). After surface wear, Mo is supposed to react with atmospheric oxygen and form a new oxide. The determination of the wear volume of thin layers cannot be measured microscopically, which is why the wear behavior is initially determined on the nano level. In this work, single Mo and MoO3 coatings prepared by physical vapor deposition (PVD) are characterized by nano testing. The main objective was to determine the wear volume of the single coatings using a newly developed method considering the initial topology. For this purpose, nano-wear tests with different wear paths and normal forces were carried out and measured by in situ scanning probe microscopy (SPM). Based on the characteristic values determined, the coefficient of wear was determined for wear modeling according to Sarkar. The validation of the wear model developed was carried out by further wear tests on the respective mono layers.",
keywords = "CoF, Micro tribology, Mo-coatings, Nano indentation, Nano wear, SPM, Wear behavior, Wear modelling",
author = "Behrens, {Bernd Arno} and Gerhard Poll and Kai M{\"o}hwald and Simon Sch{\"o}ler and Florian Pape and Dennis Konopka and Kai Brunotte and Hendrik Wester and Sebastian Richter and Norman Heimes",
note = "Funding Information: Data Availability Statement: The data presented in this study are available on request from the Informed Consent Statement: Not applicable. corresponding author. Data Availability Statement: The data presented in this study are available on request from the correspondingAcknowledgments: author.The resultspresentedinthispaperwereobtainedwithinthescopeofthepriority program “Fluidless Lubrication Systems with high Mechanical Load” (SPP 2074) in project 2, funded Acknowledgments: The results presented in this paper were obtained within the scope of the pri‐ by the German Research Foundation (Deutsche Forschungsgemeinschaft, DFG))—407673224. The ority program “Fluidless Lubrication Systems with high Mechanical Load” (SPP 2074) in project 2, authors gratefully acknowledge the German Research Foundation for their financial support of funded by the German Research Foundation (Deutsche Forschungsgemeinschaft, DFG))— this project. 407673224. The authors gratefully acknowledge the German Research Foundation for their financial sCuopnpfolirct tosfo tfhiIsn pterroejesct:t. The authors declare no conflict of interest.",
year = "2021",
month = may,
day = "21",
doi = "10.3390/nano11061363",
language = "English",
volume = "11",
journal = "Nanomaterials",
issn = "2079-4991",
publisher = "Multidisciplinary Digital Publishing Institute",
number = "6",
}