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<p>Liquid stir casting is a familiar and efficient method used for the production of magnesium matrix composites, which are suitable for making complex structural components with specific properties compared to monolithic alloys. However, magnesium matrix composites processed with conventional stir casting faced challenges in uneven particle dispersion, porosity, and oxide formation, leading to limitations in the functional properties of composites. Current research utilizes the ultrasonic-aided stir-casting route to synthesize magnesium (AZ31) alloy composites under an argon atmosphere, thereby minimizing oxide formation. Finally, the AZ31 alloy composite consists of 2 wt% aluminium nitride (AlN) and 0, 2, 4, and 6 wt% of silicon nitride (Si<sub>3</sub>N<sub>4</sub>) nanoparticles. The excellence of composite processing and hybrid filler materials in enhancing the structural, mechanical, and thermal conductivity of composites is studied. Microstructural analysis confirms that the particle distribution is homogeneous and widely dispersed in the base matrix, resulting in a significant improvement in thermo-mechanical behaviour compared to AZ31 alloy cast. The investigational result showed that the AZ31 alloy hybrid nanocomposite contained 2 wt% AlN/6 wt% Si<sub>3</sub>N<sub>4</sub> has lower porosity (0.60 %), marginal enhancement in density (1.832 g/cc), higher ultimate tensile stress (321 MPa), improved hardness (98.1 HV0.1), better enhancement in energy absorption (28.3 J), and better thermal conductivity properties (126.6 W/m&#xa0;K). This optimum composition is a trade-off for achieving a high strength-to-weight ratio in automotive structural components.</p>

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Production and Characteristics Study of the Hybrid Nitride Featured Magnesium Alloy Composites Via Liquid Metallurgy

  • 期刊论文

  • 发表日期：

    2026年1月30日

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  • M. Ruba,
  • C. Devanathan,
  • K. Balasubramanian,
  • Gopal Kaliyaperumal,
  • S. Venkatesa Prabhu,
  • Ravikumar Jayabal,
  • Ramya Maranan,
  • R. Venkatesh,
  • Vijaya Rajan Veeraraj

摘要

Liquid stir casting is a familiar and efficient method used for the production of magnesium matrix composites, which are suitable for making complex structural components with specific properties compared to monolithic alloys. However, magnesium matrix composites processed with conventional stir casting faced challenges in uneven particle dispersion, porosity, and oxide formation, leading to limitations in the functional properties of composites. Current research utilizes the ultrasonic-aided stir-casting route to synthesize magnesium (AZ31) alloy composites under an argon atmosphere, thereby minimizing oxide formation. Finally, the AZ31 alloy composite consists of 2 wt% aluminium nitride (AlN) and 0, 2, 4, and 6 wt% of silicon nitride (Si3N4) nanoparticles. The excellence of composite processing and hybrid filler materials in enhancing the structural, mechanical, and thermal conductivity of composites is studied. Microstructural analysis confirms that the particle distribution is homogeneous and widely dispersed in the base matrix, resulting in a significant improvement in thermo-mechanical behaviour compared to AZ31 alloy cast. The investigational result showed that the AZ31 alloy hybrid nanocomposite contained 2 wt% AlN/6 wt% Si3N4 has lower porosity (0.60 %), marginal enhancement in density (1.832 g/cc), higher ultimate tensile stress (321 MPa), improved hardness (98.1 HV0.1), better enhancement in energy absorption (28.3 J), and better thermal conductivity properties (126.6 W/m K). This optimum composition is a trade-off for achieving a high strength-to-weight ratio in automotive structural components.