Effect of substrate material on the tribological performance of PTFE-based polymeric coatings in a CO2 environment

Diana Dascalescu, Kyriaki Polychronopoulou, Andreas A. Polycarpou

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This work reports on the tribological performance of three commercially available PTFE-based coatings (Dupont® 958-414, Dupont® 958-303 and Whitford Xylan® 1052) deposited onto engineered disks made out of three different commonly used materials. Controlled oscillatory experiments were conducted to simulate the operating conditions of piston-type air conditioning compressors in a CO2 refrigerant environment. It was found that the substrate played a major role since failure occurred only with the Al390-T6 substrate and Whitford Xylan® was found to improve the scuffing performance of Al390-T6. The tribological performance was found to improve with increasing CO2 pressure since a thicker patchy PTFE transfer layer was formed at the interface. XPS analysis showed that metal fluorides could have a beneficial role on the tribological performance of the coatings.

Original languageBritish English
Title of host publicationSociety of Tribologists and Lubrication Engineers Annual Meeting and Exhibition 2009
Pages236-238
Number of pages3
StatePublished - 2009
EventSociety of Tribologists and Lubrication Engineers Annual Meeting and Exhibition 2009 - Lake Buena Vista, FL, United States
Duration: 17 May 200921 May 2009

Publication series

NameSociety of Tribologists and Lubrication Engineers Annual Meeting and Exhibition 2009

Conference

ConferenceSociety of Tribologists and Lubrication Engineers Annual Meeting and Exhibition 2009
Country/TerritoryUnited States
CityLake Buena Vista, FL
Period17/05/0921/05/09

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