| AVS 62nd International Symposium & Exhibition | |
| Tribology Focus Topic | Friday Sessions |
| Session TR+AS+BI+NS-FrM |
| Session: | Nanoscale Wear and Biotribology |
| Presenter: | Tevis Jacobs, University of Pittsburgh |
| Authors: | R.W. Carpick, University of Pennsylvania T.D.B. Jacobs, University of Pittsburgh |
| Correspondent: | Click to Email |
As technologies shrink to nanometer length scales, tribological interactions play an increasingly dominant role. A lack of fundamental insight into the origin of friction and wear at the nanoscale hinders the advancement of such technologies. Furthermore, macroscopic tribological applications often involve contact between nanostructured materials or at nanoscale asperities, due to surface roughness. Observing and understanding the nanoscale mechanisms at play is inhibited by the hidden nature of the buried interface and the challenge of performing observations at the nanometer scale. Recent advances in in situ methods are enabling tribological mechanisms at previously inaccessible interfaces to be studied with unprecedented resolution and sensitivity. We will discuss the application of two in situ experimental methods to develop new physical insights into tribological processes. The first approach addresses contact and wear phenomena at the atomic scale by in situ sliding in a transmission electron microscope [1], and the second addresses the generation of tribofilms from anti-wear additives using atomic force microscopy while immersed in additive-infused oil [2].
References:
[1] Jacobs, T.D.B. and Carpick, R.W. “Nanoscale Wear as a Stress-Assisted Chemical Reaction,” Nature Nanotech., 8, 2013, 108-112.
[2] Gosvami, N.N., Bares, J. A., Mangolini, F., Konicek, A.R., Yablon D.G., and R. W. Carpick. “Mechanisms of Antiwear Tribofilm Growth Revealed In Situ by Single Asperity Sliding Contacts,” Science, 348, 2015, 102-106.