Abstract
This paper studied a hybrid polytetrafluoroethylene (PTFE)/Nomex fabric composite with lower friction coefficient (COF) and high underwater wear resistance. A pin-on-disk tribometer was used to test tribological properties under different applied loads and rotation speeds. The wear surface, transfer film and cross-section were analyzed by scanning electron microscope (SEM) and optical microscope. The results showed enhanced underwater tribological properties because of excellent self-lubricating properties of PTFE fibers and a good lubricating effect and load-carrying capacity of graphite fillers. Improved underwater mechanical strength was connected to the high strength of epoxy resin and high bonding force between Nomex and epoxy resin.
Highlights
Ren et al [27] investigated the tribological properties of hybrid PTFE/Nomex fabric/phenolic composite underwater, and the results showed that the working surface was severely damaged, and the phenolic resin peeled off under distilled water and seawater; compared to seawater, the fabric composite wears more seriously under pure water lubrication
This paper mainly describes the hybrid PTFE/Nomex fabric/epoxy resin graphite reinforced composite with enhancing underwater tribological properties
Underwater tribological properties were improved by the epoxy resin and graphite filler
Summary
Ren and Wang [25] investigated the effect of graphite/graphene on the tribological behaviors of PTFE/Nomex fabric-reinforced phenolic composite. Ren et al [27] investigated the tribological properties of hybrid PTFE/Nomex fabric/phenolic composite underwater, and the results showed that the working surface was severely damaged, and the phenolic resin peeled off under distilled water and seawater; compared to seawater, the fabric composite wears more seriously under pure water lubrication. A high strength and stable performance adhesive resin was needed to improve the underwater tribological properties of hybrid PTFE/Nomex fabric composite. With the assistance of graphite filler, the hybrid fabric laminate composite has excellent tribological properties both under dry sliding and water lubrication. The effect of epoxy resin, hybrid PTFE/Nomex fabric and graphite filler was analyzed under water lubrication
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