Surface energy, hardness, and tribological properties of carbon-fiber/polytetrafluoroethylene composites modified by proton irradiation

The carbon fibers (CFs) reinforced polytetrafluoroethylene (PTFE) composites have been modified using proton irradiation, and the surface energy, hardness and tribological properties have been investigated before and after irradiation. The CFs increased the hardness and the wear resistance. Proton i...

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Bibliographic Details
Published in:Tribology international 2019-04, Vol.132, p.237-243
Main Authors: Lv, Mei, Wang, Litao, Liu, Jing, Kong, Fandong, Ling, Aixia, Wang, Tingmei, Wang, Qihua
Format: Article
Language:English
Subjects:
Aeronautics
Carbon fiber reinforced plastics
Carbon fibers
Carbonization
Composite materials
Copper base alloys
Defluorination
Hardness
Medical materials
Polytetrafluoroethylene
Polytetrafluoroethylene composites
Product design
Proton irradiation
Recarburizing
Reinforced reaction injection molding
Surface energy
Tribological properties
Tribology
Wear resistance
Wettability
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Summary:The carbon fibers (CFs) reinforced polytetrafluoroethylene (PTFE) composites have been modified using proton irradiation, and the surface energy, hardness and tribological properties have been investigated before and after irradiation. The CFs increased the hardness and the wear resistance. Proton irradiation led to defluorination and carbonization of the CF/PTFE composite surface, and decreased the surface wettability and the surface energy. The irradiation depth was 820 nm from the material surface calculated with SRIM software package. In addition, the wear resistance was improved after proton irradiation. Proton irradiation improved the wear resistance of the composite and induced the material transfer from Cu alloy surface to CF/PTFE. These significant improvements could enable potential applications in aeronautics and smart medical materials. •Introduction of CFs increased the hardness and wear rate of PTFE.•Proton irradiation led to defluorination and carbonization.•Proton irradiation reduced surface wettability and surface energy.•Proton irradiation improved the wear resistance of CF/PTFE and induced material transfer from Cu alloy to CF/PTFE.
ISSN:0301-679X
1879-2464
DOI:10.1016/j.triboint.2018.12.028