Comparative Analysis of the Influence of Nano- and Microfillers of Oxidized Al on the Frictional-Mechanical Characteristics of UHMWPE

S. V. Panin, L. A. Kornienko, S. Vannasri, L. R. Ivanova, S. V. Shil'ko

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The influence of nano- and microfillers, including nanofibers and powder of Al2O3 and aluminum oxyhydrides AlO(OH) on the mechanical and tribological characteristics of ultrahigh-molecular-weight polyethylene (UHMWPE) is studied. It is found that modification of UHMWPE with nanofibers of Al2O3 within 0.1-0.5 wt % ensures a considerable increase in its hardness and multifold increase in its wear resistance. Modification with ultradisperse powders of Al2O3 (200-500 nm) in the same amounts has an insignificant effect on the polymer characteristics. Filling of UHMWPE with micron-sized particles (3-50 μm) in amounts of 20 wt % results in increased wear resistance of the original polymer, comparable with the wear resistance at low nanofiber content. X-ray diffraction analysis, IR spectroscopy, and electron microscopy are used to show that incorporation of Al2O3 nanofibers into UHMWPE results in the formation of a fundamentally different supermolecular structure in comparison with the use of microfillers.

Original languageEnglish
Pages (from-to)371-377
Number of pages7
JournalJournal of Friction and Wear
Volume31
Issue number5
DOIs
Publication statusPublished - 2010

Keywords

  • coefficient of friction
  • nano- and microfillers
  • physicomechanical characteristics
  • supermolecular structure
  • ultrahigh-molecular-weight polyethylene
  • wear resistance

ASJC Scopus subject areas

  • Mechanics of Materials
  • Surfaces, Coatings and Films

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