| AVS 57th International Symposium & Exhibition | |
| Tribology Focus Topic | Wednesday Sessions |
| Session TR+NS+SS-WeA |
| Session: | Mechanical & Chemical Effects on Friction and Wear |
| Presenter: | U.D. Schwarz, Yale University |
| Authors: | D. Dietzel, Westfaelische Wilhelms-Universitaet Muenster, Germany T. Moenninghoff, Westfaelische Wilhelms-Universitaet Muenster, Germany C. Herding, Westfaelische Wilhelms-Universitaet Muenster, Germany M. Feldmann, Westfaelische Wilhelms-Universitaet Muenster, Germany H. Fuchs, Westfaelische Wilhelms-Universitaet Muenster, Germany C. Ritter, Yale University U.D. Schwarz, Yale University A. Schirmeisen, Westfaelische Wilhelms-Universitaet Muenster, Germany |
| Correspondent: | Click to Email |
The contact area dependence of the interfacial friction experienced during the translation of the antimony is studied under different conditions using the tip of an atomic force microscope as a manipulation tool [1]. In vacuum a dual behavior in the friction-area curves is found had been found earlier, characterized by the observation that some particles exhibit friction below the detection limit while other similarly sized particles showed constant shear stress values [2]. New investigations with improved sensitivity confirm the reproducibility of this effect and that neither the particle’s morphology nor their relative orientation towards the substrate lattice change this behavior. In contrast, we find that a temporary exposure to ambient air can lead to a drastic increase in the particle’s friction.
[1] A. Schirmeisen and U. D. Schwarz, ChemPhysChem 10 (2009) 2358
[2] D. Dietzel et al., Physical Review Letters 101 (2008) 125505