| AVS 59th Annual International Symposium and Exhibition | |
| Tribology Focus Topic | Wednesday Sessions |
| Session TR+SE-WeM |
| Session: | Tribology and Wear of Low-Friction Coatings and Materials |
| Presenter: | K.L. Harris, University of Florida |
| Authors: | K.L. Harris, University of Florida B.A. Krick, University of Florida D.W. Hahn, University of Florida W.G. Sawyer, University of Florida |
| Correspondent: | Click to Email |
Traditionally the tribological behavior of PTFE (polytetrafluoroethylene) has been studied in the steady state after many sliding cycles. Steady state studies neglect events that occur during the first contact and sliding cycles, as well as the early transient behavior of PTFE. In-situ surface plasmon resonance (SPR) tribology experiments allow for the observation of initial transfer after the first contact and first sliding cycle of PTFE. SPR showed transfer of PTFE after the first cycle of sliding, contrary to previous models of films formed by delamination wear debris. Surface enhanced raman spectroscopy (SERS) verified the chemical identity of the transfer film. Friction behavior of PTFE was shown to differ in the first cycle from the behavior seen after a transfer film was created and to depend on contact pressure and sliding speed.