Structure and Friction Behavior of UHMWPE/Inorganic Nanoparticles

Abstract:

We investigated tribological properties and worn surfaces morphology of polymer nanocomposite (PNCs) based on ultrahigh-molecular-weight polyethylene and aluminum and silicon oxide and nitride nanoparticle (NP) fillers by several methods to establish wear mechanisms. Joint mechanical activation in a planetary mill was used for the PNC preparation. PNCs with Al₂O₃ showed the best wear resistance. Scanning electron microscopy suggests that worn surfaces of PNCs with different fillers had different wear mechanisms. IR-spectroscopy and EDS analysis showed that oxidation processes occurred during friction and wear. Oxides of aluminum and silicon might be catalysts of oxidation processes. Due to tribochemical processes, cross-linked structures were formed on the PNCs surfaces. Probably, these cross-linked structures provide increase of wear resistance.

• Periodical: Key Engineering Materials (Volume 670)
• Pages: 69-75
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.670.69
• Online since: October 2015
• Authors: Aytalina A. Okhlopkova*, Raisa V. Borisova, Tatyana A. Okhlopkova, Leonid A. Nikiforov
• Keywords: Friction, Nanoparticle, Polymer Nanocomposite, Ultrahigh-Molecular-Weight Polyethylene, Wear Mechanism

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