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<p>In recent years, the demand for magnesium alloys has led to a rise in magnesium scrap production. Eggshells (ES) have emerged as a cost-effective reinforcement for magnesium composites. This study repurposes AZ91 magnesium chips by combining them with ES particles to create functionally graded composites with enhanced properties. The process involves collecting, cleaning, pre-mixing, melting, and blending the materials using stir casting. A gradient composite is formed through centrifugal casting, effectively dispersing ES particles to prevent agglomeration. The composite exhibits significant improvements in hardness, tensile, and compressive strength in the outer zone, with enhancements of approximately 34%, 12%, and 8%, respectively, over the base alloy. The wear rate measurements reveal distinct differences across the composite’s zones, with the outer zone exhibiting the lowest wear rate, followed by the middle zone, and the inner zone showing the highest wear rate. These findings highlight the potential of utilizing ES particles and magnesium waste to produce sustainable and cost-effective gradient magnesium composites for diverse applications.</p>

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Characterization of functionally graded magnesium matrix composites synthesized from waste materials

  • 期刊论文

  • 发表日期：

    2025年7月19日

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  • Reham Fathi,
  • Minghe Chen,
  • Mohammed Abdallah,
  • Adnan Saifan,
  • Bassiouny Saleh

摘要

In recent years, the demand for magnesium alloys has led to a rise in magnesium scrap production. Eggshells (ES) have emerged as a cost-effective reinforcement for magnesium composites. This study repurposes AZ91 magnesium chips by combining them with ES particles to create functionally graded composites with enhanced properties. The process involves collecting, cleaning, pre-mixing, melting, and blending the materials using stir casting. A gradient composite is formed through centrifugal casting, effectively dispersing ES particles to prevent agglomeration. The composite exhibits significant improvements in hardness, tensile, and compressive strength in the outer zone, with enhancements of approximately 34%, 12%, and 8%, respectively, over the base alloy. The wear rate measurements reveal distinct differences across the composite’s zones, with the outer zone exhibiting the lowest wear rate, followed by the middle zone, and the inner zone showing the highest wear rate. These findings highlight the potential of utilizing ES particles and magnesium waste to produce sustainable and cost-effective gradient magnesium composites for diverse applications.