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Tribological performance of PTFE composites filled with spherical-graphite

  • School of Mechatronics Engineering, Harbin Institute of Technology

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

Abstract

The tribologcial performance of PTFE composites filled with different contents of spherical-graphite and Flake-graphite were comparatively evaluated on MM-200 test rig in block-on-ring configuration under dry condition. The microstructures of worn surfaces of PTFE composites were examined with SEM, and wear mechanisms was also analyzed. The changes of notched impact strength with the content changed were also considered. The results show that the tribological performance of spherical-graphite was better than flake-graphite with same weight filled: The friction coefficient of spherical-graphite, about 0.10∼0.15, was under flake-graphite, about 0.12∼0.18; the wear rate of spherical-graphite was lower than flake-graphite at each content. Notched impact strength of spherical-graphite was from 7.0kJ/m2 to 8.7 kJ/m 2 with the content increased, while flake-graphite was fall rapidly from 8.5kJ/m2 to 3.0kJ/m2 with the content added more than 5wt. %.

Original languageEnglish
Title of host publicationNew and Advanced Materials
PublisherTrans Tech Publications Ltd
Pages1184-1187
Number of pages4
ISBN (Print)9783037850350
DOIs
StatePublished - 2011
Externally publishedYes

Publication series

NameAdvanced Materials Research
Volume197-198
ISSN (Print)1022-6680

Keywords

  • Flake-graphite
  • Friction and wear
  • PTFE composites
  • Spherical-graphite

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