Technical Brief

On the sliding wear behavior of PAEK composites in vacuum environment

[+] Author and Article Information
Géraldine Theiler

Bundesanstalt für Materialforschung und -prüfung, BAM, 12203, Berlin, Germany


Department of Mechanical Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221 005, India

Thomas Gradt

Bundesanstalt für Materialforschung und -prüfung, BAM, 12203, Berlin, Germany

1Corresponding author.

ASME doi:10.1115/1.4042271 History: Received June 19, 2018; Revised December 04, 2018


In the present study, the tribological behavior of polyaryletherketones (PAEK) composites were investigated in air and vacuum environment. Polymer matrices were filled with either glass or carbon fibers and compared with a standard bearing material containing 10% CF, 10% Graphite and 10% PTFE. The samples were tested in a pin-on-disc configuration under continuously sliding against a rotating steel disc (AISI 52100) at different speeds. Results indicate that the tribological performance of these materials in vacuum depends on both compositions as well as test conditions. At low sliding speed a very low friction and wear coefficients were obtained while at higher speed severe wear occurred. In particular, CF filled composites showed excessive wear that led to the ignition after opening the vacuum chamber. Experimental results are discussed by analysing the transfer film and wear debris.

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