TY - JOUR

T1 - Characterization and Modeling of Nano Wear for Molybdenum-Based Lubrication Layer Systems

AU - Behrens, Bernd Arno

AU - Poll, Gerhard

AU - Möhwald, Kai

AU - Schöler, Simon

AU - Pape, Florian

AU - Konopka, Dennis

AU - Brunotte, Kai

AU - Wester, Hendrik

AU - Richter, Sebastian

AU - Heimes, Norman

N1 - 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.

PY - 2021/5/21

Y1 - 2021/5/21

N2 - 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.

AB - 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.

KW - CoF

KW - Micro tribology

KW - Mo-coatings

KW - Nano indentation

KW - Nano wear

KW - SPM

KW - Wear behavior

KW - Wear modelling

UR - http://www.scopus.com/inward/record.url?scp=85106246491&partnerID=8YFLogxK

U2 - 10.3390/nano11061363

DO - 10.3390/nano11061363

M3 - Article

AN - SCOPUS:85106246491

VL - 11

JO - Nanomaterials

JF - Nanomaterials

SN - 2079-4991

IS - 6

M1 - 1363

ER -