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<p>This study optimizes stirrer design to improve the uniformity of SiC particle distribution in A356 alloy matrix composites. Through Fluent simulations and experimental validation, four stirrer designs were evaluated based on induced flow fields, turbulent kinetic energy, and shear stress. The optimized double-layer blade design (Stirrer IV) generated a bidirectional flow and higher shear stress, which effectively dispersed SiC particles and enhanced wettability. Experimental results confirmed that Stirrer IV achieved uniform radial and axial particle distribution, leading to improved hardness (118.2 HV radially and 117.8 HV axially) and a 47.3% increase in wear resistance over the baseline design. These findings demonstrate the critical role of stirrer geometry in fabricating high-performance particle-reinforced composites.</p>

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Optimisation of Stirrer Structure Improves Particle Distribution of SiC Particles Reinforced A356 Alloy Matrix Composites

  • 期刊论文

  • 发表日期：

    2025年12月9日

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  • Chengqun Zhou,
  • Weimin Zhang,
  • Ruiqing Li,
  • Ripeng Jiang,
  • Renjun Hu

摘要

This study optimizes stirrer design to improve the uniformity of SiC particle distribution in A356 alloy matrix composites. Through Fluent simulations and experimental validation, four stirrer designs were evaluated based on induced flow fields, turbulent kinetic energy, and shear stress. The optimized double-layer blade design (Stirrer IV) generated a bidirectional flow and higher shear stress, which effectively dispersed SiC particles and enhanced wettability. Experimental results confirmed that Stirrer IV achieved uniform radial and axial particle distribution, leading to improved hardness (118.2 HV radially and 117.8 HV axially) and a 47.3% increase in wear resistance over the baseline design. These findings demonstrate the critical role of stirrer geometry in fabricating high-performance particle-reinforced composites.