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<p>The present work deals with the fabrication and characterization of Al-Si alloy based hybrid metal matrix composites reinforced with SiC and Al2O3 particles for potential cylinder liner applications. The hybrid composites were fabricated by stir-casting technique by incorporating 2–4 wt% SiC with constant 2 wt% Al2O3 into the Al-Si alloy matrix. The developed composites were characterized for their densification behavior, tensile strength, compressive strength, hardness and microstructural features. The experimental results showed that the hybrid composite of Al-Si-4 wt% SiC-2 wt% Al2O3 has better mechanical properties with tensile strength of 117&#xa0;MPa, yield strength of 45&#xa0;MPa, compressive strength of 190.16&#xa0;MPa and hardness of 73 HRB. The enhanced mechanical properties were attributed to the homogeneous distribution of hard ceramic reinforcement particles and the efficient interfacial bonding of the matrix phase. SEM and EDAX analysis confirmed the successful incorporation and homogeneous dispersion of SiC and Al2O3 particles with minimum casting defects. The densification behavior showed slight porosity formation owing to the addition of reinforcement, but the developed hybrid composites exhibited satisfactory relative density. The overall results indicate that Al-Si-SiC-Al2O3 hybrid composites have improved mechanical and microstructure properties indicating their possible suitability for lightweight automotive cylinder liner applications.</p>

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Evaluation of properties of Al-Si alloy reinforced with SiC-Al2O3 hybrid metal matrix composites

  • 期刊论文

  • 发表日期：

    2026年5月27日

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  • A. Sriram,
  • B. Selvam,
  • Panneer Selvam Karuppiah

摘要

The present work deals with the fabrication and characterization of Al-Si alloy based hybrid metal matrix composites reinforced with SiC and Al2O3 particles for potential cylinder liner applications. The hybrid composites were fabricated by stir-casting technique by incorporating 2–4 wt% SiC with constant 2 wt% Al2O3 into the Al-Si alloy matrix. The developed composites were characterized for their densification behavior, tensile strength, compressive strength, hardness and microstructural features. The experimental results showed that the hybrid composite of Al-Si-4 wt% SiC-2 wt% Al2O3 has better mechanical properties with tensile strength of 117 MPa, yield strength of 45 MPa, compressive strength of 190.16 MPa and hardness of 73 HRB. The enhanced mechanical properties were attributed to the homogeneous distribution of hard ceramic reinforcement particles and the efficient interfacial bonding of the matrix phase. SEM and EDAX analysis confirmed the successful incorporation and homogeneous dispersion of SiC and Al2O3 particles with minimum casting defects. The densification behavior showed slight porosity formation owing to the addition of reinforcement, but the developed hybrid composites exhibited satisfactory relative density. The overall results indicate that Al-Si-SiC-Al2O3 hybrid composites have improved mechanical and microstructure properties indicating their possible suitability for lightweight automotive cylinder liner applications.