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This paper presents the mechanical and tribological properties of
Polytetrafluoroethylene (PTFE) and Polyetheretherketone (PEEK)
matrix composites filled with short carbon fibers in cryogenic
environments. Tensile tests were performed at room temperature (RT)
in air and in LN2. Tribological experiments were carried out with a
pin-on-disc configuration at RT, in LN2, in LH2 and in LHe. PEEK
composites have a better tribological performance than PTFE materials
especially regarding the wear resistance.