INVESTIGATION OF TRIBOLOGICAL PROPERTIES OF POLYMER COMPOSITES PRODUCED WITH NANO CERAMIC REINFORCEMENT UNDER DRY AND ALKYL BASED OIL CONDITIONS

Authors : Gökçe Mehmet Ay, Esad Kaya

Pages : 1947-1954

Doi:10.31796/ogummf.1672479

View : 40 | Download : 86

Publication Date : 2025-12-19

Article Type : Research Paper

Abstract :This study investigates the influence of Al₂O₃ nanoparticles on the tribological performance of ultra-high molecular weight polyethylene (UHMWPE) composites under dry and polyalphaolefin (PAO)-lubricated conditions. Experimental evaluations included measurements of friction coefficient, wear rate, and hardness, complemented by optical microscopy of wear tracks. Results indicated that incorporating Al₂O₃ cut μ from 0.12 to 0.07 and V̇ from 4.3 × 10⁻⁶ to 1.6 × 10⁻⁶ mm³ N⁻¹ m⁻¹ under dry sliding (4 wt % filler). With PAO, an optimum 2 wt % loading yielded μ ≈ 0.05 and V̇ ≈ 1.1 × 10⁻⁶ mm³ N⁻¹ m⁻¹. Hardness rose by ≈ 22 %,confirming the reinforcing effect of the nanoparticles. Optical microscopy confirmed ploughing wear mechanisms and highlighted issues of particle segregation at elevated filler loadings. Optimizing filler dispersion and maintaining appropriate nanoparticle concentrations are essential for maximizing the tribological advantages of UHMWPE-Al₂O₃ composites. Potential applications include bearing components, biomedical implants, and industrial sliding interfaces, while challenges remain in managing nanoparticle agglomeration.
Keywords : UHMWPE, Triboloji, Kompozit

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