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<p>The reinforced ultrahigh molecular weight polyethylene (UHMWPE) composites with nano SiO<sub>2</sub> particles (through acid-catalyzed synthesis) were produced by hot compression moulding in multi-cavity split dies to produce uniformity. Tribological performance of composites containing 2.5, 5, 7.5, and 10 <i>wt</i>% nano SiO<sub>2</sub> under dry, wet, and slurry (Al<sub>2</sub>O<sub>3</sub>) conditions was tested. Theoretical density was higher and experimental values were slightly lower, which indicates good compaction by nano SiO<sub>2</sub>. Filler content reduced porosity to 0.68 %. Wear resistance was significantly enhanced in dry situations, whereas in wet conditions wear rate and loss increased with load and speed. Nano SiO<sub>2</sub> was useful in reducing wear and friction. The findings of statistical analysis supported its high impact on wear rate and loss, as well as load and speed. These composites are designed to be used in mechanical parts such as bearings and gears that are working under friction or controlled environments. They have high wear properties, low density, and their fabrication process is reproducible, which facilitates industrial use on a scale.</p>

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Enhancing tribological performance of UHMWPE composites with nano SiO2 reinforcement: Processing, characterization, and optimization

  • 期刊论文

  • 发表日期：

    2026年5月12日

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  • Yerubandi Venkata Ramana Murty,
  • Venkata Subbaiah Kambagowni

摘要

The reinforced ultrahigh molecular weight polyethylene (UHMWPE) composites with nano SiO2 particles (through acid-catalyzed synthesis) were produced by hot compression moulding in multi-cavity split dies to produce uniformity. Tribological performance of composites containing 2.5, 5, 7.5, and 10 wt% nano SiO2 under dry, wet, and slurry (Al2O3) conditions was tested. Theoretical density was higher and experimental values were slightly lower, which indicates good compaction by nano SiO2. Filler content reduced porosity to 0.68 %. Wear resistance was significantly enhanced in dry situations, whereas in wet conditions wear rate and loss increased with load and speed. Nano SiO2 was useful in reducing wear and friction. The findings of statistical analysis supported its high impact on wear rate and loss, as well as load and speed. These composites are designed to be used in mechanical parts such as bearings and gears that are working under friction or controlled environments. They have high wear properties, low density, and their fabrication process is reproducible, which facilitates industrial use on a scale.