Abstract
Tribological characteristics of transfer films from polytetrafluoroethylene (PTFE)-based, glass-fiber reinforced composites to 440C stainless steel disks were evaluated in an ultra-high vacuum, using a dual-pin-on-disk friction tester. The transfer film was formed by rubbing a composite pin against a 440C stainless steel disk. A friction test was then carried out using the other 440C stainless steel pin. Three types of composites with the additives, Mo, Ag or MoS2 were tested. Outstanding tribological performance was obtained with the composite containing molybdenum. X-ray photoelectron spectroscopy (XPS) analysis of the transfer film showed both PTFE and metal fluoride to exist on the disks for all the composites tested. Therefore, metal fluoride is not the reason for the outstanding performance observed using the composite with the molybdenum additive. Electron probe micro analysis (EPMA) studies showed that, for the case of the composite containing molybdenum, considerable transferred fluorine was found in the center portion of the rubbing path and the distribution of fluorine coincided with that of molybdenum, while for the other composites, little fluorine existed in the center portion. The authors suppose this was caused by the catalytic action of molybdenum.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
