On the sliding wear performance of polyethernitrile composites

K. Friedrich, J. Karger-Kocsis, T. Sugioka, M. Yoshida

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The wear behaviour of neat polyethernitrile (PEN) and its composites with different types and amounts of short and continuous fibre reinforcement was studied as a function of relative sliding direction and pressure-sliding speed combinations at ambient temperature. The specific wear rate .ws, measured against steel under dry sliding, for the neat PEN decreased by one order of magnitude with increasing fibre volume fraction Vf up to about 10 vol.%, above which no further improvements in wear resistance was found. Incorporation of short carbon fibres (CFs) proved to be more beneficial than glass fibres with respect to improvements in .ws. The specific wear rate was further reduced by using pitch-based CFs instead of CFs based on polyacrylnitrile (PAN). This was attributed to the effects of a better interfacial adhesion of the pitch-based CFs to the matrix and to their resistance against fibre fracture events in dry sliding conditions. Use of polytetrafluoroethylene particles as lubricants affected the wear performance only slightly. Clear differences in the function of relative sliding direction with respect to the main fibre orientation at the surface to be worn could not be found either. The PAN-based CF-filled composites exhibited higher .ws rates than the pitch-based composites when the fibres were aligned in plane with the sliding direction. This was attributed to the inherent layer structure of the PAN-based CFs. Wear mechanisms were studied by scanning electron microscopy and used to interpret the mechanical wear data. Furthermore, a wear model, recently proposed by Friedrich and Voss, seemed to work properly to predict the wear performance of these composite systems, after adjusting its free variables to the experimental results.

Original languageEnglish
Pages (from-to)157-170
Number of pages14
JournalWear
Volume158
Issue number1-2
DOIs
Publication statusPublished - Oct 15 1992

Fingerprint

sliding
carbon fibers
Wear of materials
Carbon fibers
composite materials
Composite materials
Fiber reinforced materials
fibers
Fibers
fiber volume fraction
fiber orientation
polytetrafluoroethylene
Steel
Polytetrafluoroethylene
glass fibers
lubricants
reinforcement
wear resistance
Polytetrafluoroethylenes
Glass fibers

ASJC Scopus subject areas

  • Engineering(all)
  • Mechanical Engineering
  • Surfaces, Coatings and Films

Cite this

On the sliding wear performance of polyethernitrile composites. / Friedrich, K.; Karger-Kocsis, J.; Sugioka, T.; Yoshida, M.

In: Wear, Vol. 158, No. 1-2, 15.10.1992, p. 157-170.

Research output: Contribution to journalArticle

Friedrich, K. ; Karger-Kocsis, J. ; Sugioka, T. ; Yoshida, M. / On the sliding wear performance of polyethernitrile composites. In: Wear. 1992 ; Vol. 158, No. 1-2. pp. 157-170.
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