| AVS 62nd International Symposium & Exhibition | |
| Tribology Focus Topic | Thursday Sessions |
| Session TR+TF-ThM |
| Session: | Nanolubricants and Coatings |
| Presenter: | Martin Dienwiebel, Karlsruhe Institut for Technology (KIT), Germany |
| Authors: | M. Dienwiebel, Karlsruhe Institut for Technology (KIT), Germany P. Stoyanov, Karlsruhe Institut for Technology (KIT), Germany T. Feser, Karlsruhe Institut for Technology (KIT), Germany R. Merz, Insitut für Oberflächen und Schichtanalytik GmbH, Germany P. Romero, Fraunhofer Institute for Mechanics of Materials IWM, Germany F.C. Wählisch, INM - Leibniz-Institute for New Materials, Germany P. Stemmer, University of Duisburg-Essen, Germany M. Moseler, Fraunhofer Institute for Mechanics of Materials IWM, Germany R. Bennewitz, INM - Leibniz-Institute for New Materials, Germany A. Fischer, University of Duisburg-Essen, Germany |
| Correspondent: | Click to Email |
During sliding of metallic surfaces in dry or lubricated conditions the near surfaces undergo significant changes in terms of topography, composition and microstructure [1] and a so-called “third body” or "tribomaterial" [2] develops. The third-body formation strongly influences the frictional and wear behavior of the system.
In this talk we present several experiments on pure metals and alloys that were performed using a novel experimental platform for the on-line correlation of friction, wear and topography under lubricated sliding [3]. Fast topography data is measured in real time by digital holography microscopy (DHM), wear is measured by the Radionuclide wear technique (RNT) and the nanoscale topography is obtained in-situ by liquid atomic force microscopy (AFM). The tribological systems that we recently studied include a-brass (CuZn) sliding against steel [4], tungsten and tungsten carbide [5], [6]. The experimental findings were compared to MD simulations. In order to characterize the mechanical behavior, nanoindentation and micropillar compression tests were performed that show that the third body material is softening during the initial running-in [7].
References[1] M. Scherge, D. Shakhvorostov, K. Pöhlmann, Wear, 255 (2003) 395-400.
[2] M. Godet, Wear, 100 (1984) 437–452.
[3] S. Korres, M. Dienwiebel, Rev. Sci. Instr., 81 (2010) 063904.
[4] T. Feser, P. Stoyanov., M. Dienwiebel, Wear, 303 (2012) 465-472
[5] P. Stoyanov et al. , Tribol. Lett., 50 (2013) 67-80.
[6] P. Stoyanov et al., ACS Appl. Mat. & Int.s, 5 (2013) 6123-6135.
[7] P. Stoyanov et al., ACS Nano 9 (2015) 1478