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<p>This study investigates the effect of SiO<sub>2</sub> (silicon dioxide) powder as a reinforcement material in AA8011 aluminium matrix composites fabricated using the stir casting technique. The composites were produced with varying SiO<sub>2</sub> contents of 0, 3, 6, and 9 wt% to evaluate their mechanical and tribological performance. The incorporation of SiO<sub>2</sub> particles resulted in significant improvements in mechanical properties and wear resistance while maintaining a lightweight structure. The ultimate tensile strength increased from 156&#xa0;MPa for the unreinforced alloy to 210&#xa0;MPa for the composite containing 9 wt% SiO<sub>2</sub>, indicating substantial strengthening due to effective load transfer and grain refinement. Similarly, microhardness showed a noticeable improvement with increasing reinforcement content. However, the impact strength decreased by 11.42%, 22.85%, and 34.28% for composites containing 3 wt%, 6 wt%, and 9 wt% SiO<sub>2</sub>, respectively, compared with the base alloy. Wear tests conducted using a pin-on-disc apparatus demonstrated a considerable reduction in wear rate with increasing SiO<sub>2</sub> reinforcement, particularly under higher loading conditions, due to the load-bearing capability and hardness of SiO<sub>2</sub> particles. Microstructural analysis confirmed a relatively uniform distribution of reinforcement within the aluminium matrix, although minor particle agglomeration was observed at higher reinforcement levels. Overall, the results indicate that SiO<sub>2</sub>-reinforced AA8011 composites fabricated through stir casting offer improved mechanical strength and enhanced wear resistance, making them suitable for lightweight structural and tribological applications in automotive, aerospace, and engineering sectors.</p>

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Prediction of wear outcomes and mechanical characterization of innovative SiO2 incorporated aluminium matrix composites

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年3月23日

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  • Abhijit Bhowmik,
  • Raman Kumar,
  • Kamal Sharma,
  • Mahendrasinh R. Chauhan,
  • Pardeep Singh Bains,
  • Kamaljit Singh,
  • Harjot Singh Gill,
  • Valentin Romanovski,
  • N. Ashok

摘要

This study investigates the effect of SiO2 (silicon dioxide) powder as a reinforcement material in AA8011 aluminium matrix composites fabricated using the stir casting technique. The composites were produced with varying SiO2 contents of 0, 3, 6, and 9 wt% to evaluate their mechanical and tribological performance. The incorporation of SiO2 particles resulted in significant improvements in mechanical properties and wear resistance while maintaining a lightweight structure. The ultimate tensile strength increased from 156 MPa for the unreinforced alloy to 210 MPa for the composite containing 9 wt% SiO2, indicating substantial strengthening due to effective load transfer and grain refinement. Similarly, microhardness showed a noticeable improvement with increasing reinforcement content. However, the impact strength decreased by 11.42%, 22.85%, and 34.28% for composites containing 3 wt%, 6 wt%, and 9 wt% SiO2, respectively, compared with the base alloy. Wear tests conducted using a pin-on-disc apparatus demonstrated a considerable reduction in wear rate with increasing SiO2 reinforcement, particularly under higher loading conditions, due to the load-bearing capability and hardness of SiO2 particles. Microstructural analysis confirmed a relatively uniform distribution of reinforcement within the aluminium matrix, although minor particle agglomeration was observed at higher reinforcement levels. Overall, the results indicate that SiO2-reinforced AA8011 composites fabricated through stir casting offer improved mechanical strength and enhanced wear resistance, making them suitable for lightweight structural and tribological applications in automotive, aerospace, and engineering sectors.